1.4.0.6

fix 423 - Symbols for non-standard C# events
fix 235 - XmlDocSigs for references assemblies
fix 177 - GetAllUsesOfAllSymbolsInFile returns nothing for C# nested enum
make Internal.Utilities.Text.Lexing.Position a struct
Exposing assembly attributes on FSharpAssemblySignature
clean up IncrementalFSharpBuild.frameworkTcImportsCache