Add ability to specify how AssemblyVersion is set.

[dazinator]

I noticed that when setting the AssemblyVersion attribute, only the Major and Minor are used.

I have updated the wiki to reflect that and why it does it (as I can guess): https://github.com/ParticularLabs/GitVersion/wiki/MSBuild-Task-Usage

However, in certain scenarios, like mine for instance, where the assembly is registered in the GAC, it may be desirable for them to have the AssemblyVersion set with the full version number i.e Major.Minor.Patch.

I think it would be nice if some command line paramater could be added so that the format could be specified for setting this attribute.

i.e something like:

/updateassemblyinfo true /assemblyversionformat MajorMinorPatch

[dazinator]

PR submitted for this if you want it

[dazinator]

I noticed this went out in a release, closing.