Added option to control whether YCM should auto-stop the omnisharp server upon leaving Vim or leave it running.
Merge branch 'master' into OmnisharpAutoStopOption
Added new flag (g:ycm_auto_stop_csharp_server) to docs.
Merge pull request #500 from svermeulen/OmnisharpAutoStopOption

Added option to control whether YCM should auto-stop the omnisharp server upon leaving Vim or leave it running.