* Added parsing of table hints

* Implemented USE INDEX hints

* Added docs, tidied up code for submission

* Added docs, tidied up code for submission

* Removed used of final static field that would cause problems with Tomcat class unloading

* Removed used of final static field that would cause problems with Tomcat class unloading

* A table with no index hints now has indexHints == null, instead of an employ instance of IndexHints. For the common case of no index hints, this will prevent some unnecessary object creation.

* Index Hints now is backward compatible with using the "USE" as a table alias

* Added TestIndexHints to list of all tests

* Added index hints to text generated by TableFilter.getPlanSQL();

* Improved field names (a field called indexList was actually a set);
Added test for ensuring getPlanSQL lists index hints in correct order

* Improved unit test for making sure getPlanSQL renders index hints list in correct order