Cleanup doc generation code, move it to bin/, add PDF generation and dependency installation command

Fix connection execute query example

Added PDO SQL Srv driver to the list

Add chapter on database portability, added section to data retrieval and manipulation on binding type handling and parameter lists.

Conflicts:
	reference/en/data-retrieval-and-manipulation.txt

[data-retrieval] fetchRow() has been renamed fetchAssoc() in the API. Changed the name in the documentation consequently.

Added Known Vendor Issues section into the DBAL manual, detailing PostgreSQL DateTime microseconds problem and the solution implemented in DBAL-33