Fixed some directory problems. Made the project .net45 (Readme.md says it requires it, however it defaults to .net4).

Modified:
- ViewResult.cs, Replaced \ with /. Razer.ExecuteUrl will not accept \ in the path.
- StaticContentHandler.cs, uses Path.DirectorySeperatorChar, /, and \ to substring.
Merge pull request #7 from headdetect/master

Fixed some directory problems. Made the project .net45