Update roslyn branch build badges

Author: Omar Tawfik

README.md

@@ -8,8 +8,7 @@
 |            |Debug (Build only)|Release (Tests Part 1)|Release (Tests Part 2)|
 |:----------:|:----------------:|:------------------:|:-----------------------:|
 |**master**  |[![Build Status](http://dotnet-ci.cloudapp.net/buildStatus/icon?job=Microsoft_visualfsharp/master/debug_windows_nt)](http://dotnet-ci.cloudapp.net/job/Microsoft_visualfsharp/job/master/job/debug_windows_nt/)|[![Build Status](http://dotnet-ci.cloudapp.net/buildStatus/icon?job=Microsoft_visualfsharp/master/release_ci_part1_windows_nt)](http://dotnet-ci.cloudapp.net/job/Microsoft_visualfsharp/job/master/job/release_ci_part1_windows_nt/)|[![Build Status](http://dotnet-ci.cloudapp.net/buildStatus/icon?job=Microsoft_visualfsharp/master/release_ci_part2_windows_nt)](http://dotnet-ci.cloudapp.net/job/Microsoft_visualfsharp/job/master/job/release_ci_part2_windows_nt/)|
-|**vs2015**  ||||
-|**roslyn** ||||
+|**roslyn**  |[![Build Status](http://dotnet-ci.cloudapp.net/buildStatus/icon?job=Microsoft_visualfsharp/roslyn/debug_windows_nt)](http://dotnet-ci.cloudapp.net/job/Microsoft_visualfsharp/job/roslyn/job/debug_windows_nt/)|[![Build Status](http://dotnet-ci.cloudapp.net/buildStatus/icon?job=Microsoft_visualfsharp/roslyn/release_ci_part1_windows_nt)](http://dotnet-ci.cloudapp.net/job/Microsoft_visualfsharp/job/roslyn/job/release_ci_part1_windows_nt/)|[![Build Status](http://dotnet-ci.cloudapp.net/buildStatus/icon?job=Microsoft_visualfsharp/roslyn/release_ci_part2_windows_nt)](http://dotnet-ci.cloudapp.net/job/Microsoft_visualfsharp/job/roslyn/job/release_ci_part2_windows_nt/)|
 
 ###Contributing to the F# Language, Library, and Tools