Fix table borders in PDF and other changes

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