Added .gitignore file

Includes some basic Visual Studio file types, a few compiled types and
the bin and obj directories that contain them, and a short list of files
the OS may generate.
Fixed VersionCheck.cs not to alert if web is older

Reworked code to verify each segment of the version strings with regular
expressions, rather than assuming a different value is a new one
Merge pull request #16 from amazingant/amazingant-pullrequest

Amazingant pullrequest