Fixed ilmerge using the wrong reference assemblies if you have .NET 4.5 installed (when compiling against .Net 4.0).
Updated MongoDB driver to version 1.7
Fixed the Timestap representation to use the DateTime.Ticks instead of the plain json representation of the DateTime object

Fixed the Timestap representation to use the DateTime.Ticks instead of
the plain json representation of the DateTime object. This helps to
mitigate the problem of Timestamps being cut at the milliseconds level,
which can have negative impacts in very fast systems.
Fixed the internalization of MongoPersistence.wireup
Updated MongoDB driver to 1.7.1
Merge remote-tracking branch 'remotes/joliver/master' into MongoDb18

Conflicts:
	build/default.ps1
Updated the MongoDb C# driver to 1.8