Merge pull request #296 from linquize/sln

Sync VS2010, VS2012 and VS2013 solution files
Fix #299
Merged all copyright changes in /src from visualfsharp.codeplex.com
Merge pull request #302 from forki/master

Merged all copyright changes in /src from visualfsharp.codeplex.com
Update README.md
Fix #304
Source code alignment
enable disabled test
Unicode letters & operators

examples:
let ★ x = x + 5
let (|★) x y = x + y
let summ = ★ 5 |★ 5
comment about \So infix operators