Fixed comparison bug.

Stupid bug in CompareTo fixed. Please use this version.

First official release.

InformationalVersion, SVersion and CSVersion expose a ParsedErrorMessage that details any parse error.

Syntax check is very strict and should remain strict in any subsequent version.

What is missing in the equivalence check between NuGet and SemVer version in the InformationalVersion: this requires CSVersion to be able to parse the NuGet version format and it has yet to be done. This is planned for v2 and the "NuGet" term should be renamed to "ShortForm" (the SemVer format being the "long form").