Add R# Annotations.cs
Fix remaining templates and fix R# warnings

Add UsedImplicitly attributes
Explicitly ignore certain R# warnings
Rename to angle.json
Add area unit

And support for multiple .json files with a class of units each.
Generate unit enums from json files
Add duration unit
TAB to space
Delete temp file
Fix type name of generated enums
Add support for prefixes

Just specify Prefixes property with an array of prefixes such as Kilo,
Hecto, Deci etc..
Add units: electric, flow, force, length
Fix whitespace in generated code