Adjust project files to allow editing with Xamarin Studio
Enable portable-net45+sl5+win8 profile (Profile7)
Updates to Profile7 support
Fix https://github.com/fsharp/fsharp/issues/282
Fix https://github.com/fsharp/fsharp/issues/196
add Sample_VS2012_FSharp_Portable_Library_upgraded_2013
Merge branch 'master' of https://github.com/fsharp/fsharp
Fix https://github.com/fsharp/fsharp/issues/283: build 2.3.5.0 FSharp.Core PCL assembly
Updates to tests on OSX for Mono 3.2.7
Update travis to use Mono 3.2.7 and run more tests
Unicode letters & operators

examples:
let ★ x = x + 5
let (|★) x y = x + y
let summ = ★ 5 |★ 5
comment about \So infix operators
apply & merge optimizations from : https://github.com/jack-pappas/fs-core-optimized , thanks to Jack Pappas
revert set.fs optimizations due complicated conflicts