Since integrating our repos, there have been a number of changes in PRs that touch the encoding of the file, adding or removing a BOM as the editor in question decides. I've standardized on UTF-8 with BOM, as we do in roslyn, and put it in the .gitattributes so it should hopefully stay consistent.
- Updated repo NOTICE.txt to mention latest third party components.
- Removed individual component NOTICE.txt files. Instead all platforms now ship the same NOTICE.txt so we don't need to keep updating it everywhere.
- Added NOTICE.txt to Razor langauge server
- Added NOTICE.txt to Razor addin
Fixes https://devdiv.visualstudio.com/DevDiv/_workitems/edit/1531325