--- Able to compile in Monodevelop IDE ---

Fixed a variety of compilation issues:
- moved all projects to .NET 4.5 + MVC 3 (with GAC dll referenced)
- small casing fixes
- made Umbraco.Core.Logging visible to umbraco.datalayer
- added references for external dlls
- removed reference to Microsoft Infrastructure
- updated .gitignore file
- some changes to SQLCE4Umbraco
re-commit missing file