Xamarin tools version update.
Assume DateTime.MinValue is UTC
Reworking RqlId to be a byte array with base 62 encoding.

This keeps the internal database id implementation a little bit more hidden and abstracted from the REST API user.
Added a command line tool for MongoDB to RQL id conversions.
Fixed all unit tests.
Updating version number.
Adding test for SortSpecToMongoSortByCompiler

Removing inquery() operator.
Adding better README.