Created Issue: Add support for specifying the AssemblyInformationalVersion as an artibtraty string [10397]

Presently, there is only the UpdateAssemblyInformationalVersion property on the AssemblyInfo task. If this property is true, the value of the AssemblyVersion property will be copied into the AssemblyInformationalVersionAttribute. It would be very helpful, if (instead or in addition) the AssemblyInformationalVersion could be specified as a property holding an arbitrary string. This way, the full power of the product version (e.g. appending "Beta2" or "RC1", and using marketing version numbers) could be utilized.

I've seen that the UpdateAssemblyInformationalVersion property was introduced in response to
http://msbuildextensionpack.codeplex.com/workitem/6372

A second request was filed here:
http://msbuildextensionpack.codeplex.com/workitem/6899

Please add complete support for this attribute.

Regards, Michael