Changes to date and time expression classes
Add DateToStringExpression.js
EAGLESIX-2706 expression Compare ported to mongo 2.6.5
EAGLESIX-2708 expression Subtract ported to mongo 2.6.5
Merge branch 'feature/mongo_2.6.5_expressions' into feature/mongo_2.6.5_expressions_Date
Added DateToString.js and started the test cases module
Added a few DateToString test case skeletons
Merge branch 'feature/mongo_2.6.5_expressions' into feature/mongo_2.6.5_expressions_Date
EAGLESIX-2712: minor changes and comments
EAGLESIX-2713: formatting
EAGLESIX-727 Expressions: Date-related expression comments, finish DateToString
Merge branch 'feature/mongo_2.6.5_expressions' into feature/mongo_2.6.5_expressions_Date
EAGLESIX-727 Expressions... DateToString.  evaluateInternal() change to return a null for null input
EAGLESIX-2719 expression Strcasecmp mongo 2.6.5 port
EAGLESIX- filling out the test cases, minor changes to expression classes.
EAGLESIX-2720 expression Substr ported to mongo 2.6.5
EAGLESIX-2699 This includes ifNull, Not, and Cond.  The latter is turning out to be interesting - I am not sure the code we have works at all.
EAGLESIX-2699 Filled out test cases for 'object' implementation of $cond.
EAGLESIX-2699 more enhancements to the $cond code.
EAGLESIX-2696 Added more comments to help me remember what to fix :-P