Update project documentation

[DanyloMykhalchenko]

Corrections:

1. Don't use company names in xml help
2. Try not to use product names (e.g. Triodion Docs) where possible

• Update README.MD
• Update Build.props
• -Links- -> not fixing this at the moment
  ** https://community.sdl.com
  ** https://sdl.github.io/
  ** https://github.com/sdl/
  ** * Copyright (c) 2014 All Rights Reserved by the SDL Group.
• Comments (xml help of a module)
  ** Update help text on parameters containing "SDL Tridion Docs Content Manager"
  ** /// Set-IshMetadataField -Name FISHEMAIL -Value "ishremote@sdl.com" |
  ** /// Password to login into SDL Tridion Docs Content Manager
  ** https://example.com/ISHWS/SDL/
• -PowerShell-
  ** Add-SDLOpenSourceHeader