fix nant warnings
fix whitespace
make booi depend on Boo.Lang.PatternMatching for convenience
Revert "don't depend on System.Collections.Hashtable for it's no longer supported in mobile framework versions"

This reverts commit 256ff07e43715268b48b68a14b09c86e53fdeeae.

Conflicts:

	src/Boo.Lang/Hash.cs
always load the Boo.Lang.Extensions.dll next to the compiler or none at all
bump version number and start using semantic versioning
Merge pull request #13 from Unity-Technologies/master

reverting abi breaking changes to Boo.Lang.Hash