Three methods and one propert added

• New methods added: GetRelease, GetLatestTag and CheckForUpdate.
• There is now a property regEx.

Also a couple of methods got renamed; for example

• GetReleaseByTagName became GetReleaseInfoByTagName
• GetLatestRelease became GetLatestReleaseInfo

That's because these function did not returns a relase as such but just meta data.