Don't eliminate delegate caching when lambda decompilation is disabled.

Closes #388
Merge branch 'master' of git://github.com/icsharpcode/ILSpy
Merge pull request #402 from vwoodzell/master

Fix baml property formatting bug
fix #397 - Incorrect code generated for adding event handler in VB.NET.
fix  #367 - VB output issues
fix #371 - BAML decompiler throws NullReferenceExceptions: if this cause occurs it should throw a better exception than just NRE
Merge branch 'master' of git://github.com/icsharpcode/ILSpy
Fix namespace prefixes of property elements.