Implement Cobra CLI tooling, Viper config tooling (#336)

* start pulling out + replacing urfave and config

* replace many many instances of config

* move more stuff => viper

* properly remove urfave

* move some flags to root command

* add testrig commands to root

* alias config file keys

* start adding cli parsing tests

* reorder viper init

* remove config path alias

* fmt

* change config file keys to non-nested

* we're more or less in business now

* tidy up the common func

* go fmt

* get tests passing again

* add note about the cliparsing tests

* reorganize

* update docs with changes

* structure cmd dir better

* rename + move some files around

* fix dangling comma

vendor/github.com/magiconair/properties/doc.go

@@ -0,0 +1,156 @@
+// Copyright 2018 Frank Schroeder. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package properties provides functions for reading and writing
+// ISO-8859-1 and UTF-8 encoded .properties files and has
+// support for recursive property expansion.
+//
+// Java properties files are ISO-8859-1 encoded and use Unicode
+// literals for characters outside the ISO character set. Unicode
+// literals can be used in UTF-8 encoded properties files but
+// aren't necessary.
+//
+// To load a single properties file use MustLoadFile():
+//
+//   p := properties.MustLoadFile(filename, properties.UTF8)
+//
+// To load multiple properties files use MustLoadFiles()
+// which loads the files in the given order and merges the
+// result. Missing properties files can be ignored if the
+// 'ignoreMissing' flag is set to true.
+//
+// Filenames can contain environment variables which are expanded
+// before loading.
+//
+//   f1 := "/etc/myapp/myapp.conf"
+//   f2 := "/home/${USER}/myapp.conf"
+//   p := MustLoadFiles([]string{f1, f2}, properties.UTF8, true)
+//
+// All of the different key/value delimiters ' ', ':' and '=' are
+// supported as well as the comment characters '!' and '#' and
+// multi-line values.
+//
+//   ! this is a comment
+//   # and so is this
+//
+//   # the following expressions are equal
+//   key value
+//   key=value
+//   key:value
+//   key = value
+//   key : value
+//   key = val\
+//         ue
+//
+// Properties stores all comments preceding a key and provides
+// GetComments() and SetComments() methods to retrieve and
+// update them. The convenience functions GetComment() and
+// SetComment() allow access to the last comment. The
+// WriteComment() method writes properties files including
+// the comments and with the keys in the original order.
+// This can be used for sanitizing properties files.
+//
+// Property expansion is recursive and circular references
+// and malformed expressions are not allowed and cause an
+// error. Expansion of environment variables is supported.
+//
+//   # standard property
+//   key = value
+//
+//   # property expansion: key2 = value
+//   key2 = ${key}
+//
+//   # recursive expansion: key3 = value
+//   key3 = ${key2}
+//
+//   # circular reference (error)
+//   key = ${key}
+//
+//   # malformed expression (error)
+//   key = ${ke
+//
+//   # refers to the users' home dir
+//   home = ${HOME}
+//
+//   # local key takes precedence over env var: u = foo
+//   USER = foo
+//   u = ${USER}
+//
+// The default property expansion format is ${key} but can be
+// changed by setting different pre- and postfix values on the
+// Properties object.
+//
+//   p := properties.NewProperties()
+//   p.Prefix = "#["
+//   p.Postfix = "]#"
+//
+// Properties provides convenience functions for getting typed
+// values with default values if the key does not exist or the
+// type conversion failed.
+//
+//   # Returns true if the value is either "1", "on", "yes" or "true"
+//   # Returns false for every other value and the default value if
+//   # the key does not exist.
+//   v = p.GetBool("key", false)
+//
+//   # Returns the value if the key exists and the format conversion
+//   # was successful. Otherwise, the default value is returned.
+//   v = p.GetInt64("key", 999)
+//   v = p.GetUint64("key", 999)
+//   v = p.GetFloat64("key", 123.0)
+//   v = p.GetString("key", "def")
+//   v = p.GetDuration("key", 999)
+//
+// As an alternative properties may be applied with the standard
+// library's flag implementation at any time.
+//
+//   # Standard configuration
+//   v = flag.Int("key", 999, "help message")
+//   flag.Parse()
+//
+//   # Merge p into the flag set
+//   p.MustFlag(flag.CommandLine)
+//
+// Properties provides several MustXXX() convenience functions
+// which will terminate the app if an error occurs. The behavior
+// of the failure is configurable and the default is to call
+// log.Fatal(err). To have the MustXXX() functions panic instead
+// of logging the error set a different ErrorHandler before
+// you use the Properties package.
+//
+//   properties.ErrorHandler = properties.PanicHandler
+//
+//   # Will panic instead of logging an error
+//   p := properties.MustLoadFile("config.properties")
+//
+// You can also provide your own ErrorHandler function. The only requirement
+// is that the error handler function must exit after handling the error.
+//
+//   properties.ErrorHandler = func(err error) {
+//	     fmt.Println(err)
+//       os.Exit(1)
+//   }
+//
+//   # Will write to stdout and then exit
+//   p := properties.MustLoadFile("config.properties")
+//
+// Properties can also be loaded into a struct via the `Decode`
+// method, e.g.
+//
+//   type S struct {
+//       A string        `properties:"a,default=foo"`
+//       D time.Duration `properties:"timeout,default=5s"`
+//       E time.Time     `properties:"expires,layout=2006-01-02,default=2015-01-01"`
+//   }
+//
+// See `Decode()` method for the full documentation.
+//
+// The following documents provide a description of the properties
+// file format.
+//
+// http://en.wikipedia.org/wiki/.properties
+//
+// http://docs.oracle.com/javase/7/docs/api/java/util/Properties.html#load%28java.io.Reader%29
+//
+package properties