Updated to latest FSpec
Changed parse function

Because I like it better now
Added Paket package manager
Changed code to use FsLexYacc package

This is a specialized package containing just what we need, the lexbuffer,
lexer- and parser generators, instead of the FSharpPowerPack.
Changed project to use FsLexYacc build targets
Ignore ncrunch project files
Removed FSharp.PowerPack nuget package

No longer needed, as we are referenceing FsLexYacc package instead
Use paket instead of NuGet for installing FSpec
Added MbUnitWrapper to project

Allows NCrunch to execute specs