First prototype for generating nodes.
Tuple2 added.
First running example added.
Very first prototype for deep embedding cake
Identity map is working correctly.
All cases of map is working.
YYProjection2 added.
Lots of cleanup.
filter and flatMap added. Things are more readable now.
length method added. YYQuery refactored to include more methods simpler.
sbt config is adapted to include YinYang. Stub to work with YinYang added, But it needs more effort to work correctly.
Dummy code generator added.
map is working! Vojin patches applied.
filter, Tuple2, == working.

* A solution needs to be found for Table. It's not so simple to be resolved.
* Lots of cleanups are necessary.
Shallow interface moved to seperate file, test cleaned up.
identity map for table working
map and filter working for test table.
prototype TableRow cleaned up, and more clean ups.
YYWrapper added.
Some issues fixed to be able to run full test.