Fix some grammar descriptions and ALTER TABLE DROP COLUMN parsing

Fix building of documentation and use modern names of Java versions

Assorted changes in documentation and a fix for current-time.sql

add Support for MySQL: DROP INDEX index_name ON tbl_name

Fix page numbers in TOC in PDF and move System Tables into own HTML / section in PDF

Use >> syntax in median.sql and move out more tests from testScript.sql

Short syntax for SQL tests