Decimal column Update if precision or scale was changed

- Switch from phing to ant
- Add composer archive for packages
- Remove PEAR package building

Added regression test for the Portability Wrapper when setting the defaultFetchMode on the Connection instead of the Statement

Portability wrapper did not properly use the _defaultFetchMode when the method setFetchMode() was used on the Connection

Removed an unused method in AbstractPlatform.

Documentation fixes

- 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