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

testrig/typeconverter.go

@@ -25,5 +25,5 @@ import (
 
 // NewTestTypeConverter returned a type converter with the given db and the default test config
 func NewTestTypeConverter(db db.DB) typeutils.TypeConverter {
-	return typeutils.NewConverter(NewTestConfig(), db)
+	return typeutils.NewConverter(db)
 }