Fix PSR2 rules : "As per PSR2, the static declaration should come after the visibility declaration."

Fixed incorrect handling of single quotes in SQL-Strings escaped by repeated single-quote (DBAL-1205)

- Fixed docblocks
- Removed return statements on void methods
- Cleaned up unused private / local variables
- Fixed license issues
- Removed SVN leftovers
- Fixed doctrine-project.org links
- Added line breaks before return statements

This reverts commit 0b6a6aef.

regex pattern does not support sql casting using :: operator for example select mydate::date from mytable;

Removed is_int check and converted both comparisons into equality comparisons when expanding list parameters.