Change version numbers before 2.0 release

[nijtmans]

The (microsoft) convension for dll's doesn't start with "lib" as on UNIX. So I suggest to use "tommath2.dll" as dll name. Also I made the other necessary corresponding makefile-related changes for the major upgrade.

[minad]

The "big change" here is the name change of the dll. I am not sure if we want to include the version number in the name. This is the job of a distribution or package builder I think. @sjaeckel will take care of the other changes regarding the version numbers.

[nijtmans]

On other platforms than Windows - indeed - it is not customary to have a version number in the library name. On Windows it's normal (examples: ws2_32.dll, zlib1.dll, winsqlite3.dll, tcl86.dll, msvcr100.dll ...). Windows dll's simply don't have a suitable mechanism as other platforms do.

[nijtmans]

ping?

[czurnieden]

Would you do us a favor and rebase on develop, if you don't mind? Thank you!

[sjaeckel]

This will only be merged right before the 2.0.0 release, so there's no need to rebase now.

[czurnieden]

This will only be merged right before the 2.0.0 release, so there's no need to rebase now.

Ah, thanks!