Grammar documentation: Extracting columnName from "Column Definition" for reuse in ALTER TABLE ALTER COLUMN.

The charset collator allows sorting strings according to their binary representation in a given charset.

H2 supports recursive common table expressions. Unfortunately they are
not covered in the official grammar documentation so some people don't
know about it.

I had to reverse engineer the syntax by looking at the parser source so
it may contain errors. This commit does contain maybe not the greatest
documentation ever but I feel it's an improvement over the current
situation.

After some additional test for #476 and more checking with the source
code I found out that I make a mistake in the grammar. The
MySQL/Postgres and the Derby/Oracle syntax should be different
productions.

Since 1.4.177 H2 supports FETCH FIRST x ROW ONLY however this is not
reflected in the grammar documentation. This covers all the variations
of the syntax.

There are 3 `help.csv` but I believe I got the right one. Some of the
checked in files seem to have been automatically changed and I don't
know if I should have committed those as well.

Fixes #475

* Added WITH to CREATE SCHEMA to supply default TableEngine params

* Updated docs to reflect changes in CREATE SCHEMA

* Review fixes - docs; code de-duplication; test for table engine params in schema

* Setter for table engine params in Schema

* 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