Merge pull request #22 from cameronfletcher/release

Release v0.4
#23 Creating development branch for release v0.5
Updates to build script
#25 Added extension for NullOrEmptyOrNullElements
#25 Added missing StyleCop suppressions
Fixed #12 with a complete IL parsing re-write
Fixed #30 by updating Guard.cs files to conform with Resharper
Fixed #29 by placing DebuggerStepThrough attribute on properties
Fixed #20 by adding new icon for Guardian Extensions
Fixed #30 with minor changes.
Fixed #33 by removing linked Guard and GuardExtensions files
Fixed #34 by adding test to capture null expression when parsing
Merge pull request #35 from cameronfletcher/dev

#23 Release v0.5 (beta 01)