EAGLESIX-2651: Value: better sync w/ 2.6.5 changes

* fix bugs and fill in a few missing type handlers
* doc any other missing type handlers
* fix inconsistencies with original implementation
Merge pull request #107 from RiveraGroup/bugfix/mongo_2.6.5_value

Value: better sync w/ 2.6.5 changes
Merge branch 'feature/mongo_2.6.5_expressions' into feature/mongo_2.6.5_expressions_Add_And_Or