* h/t @stof and @deeky666
 * add two test cases for the general connection test
 * remove the ConnectionException method I added originally

This PR introduces a new PingableConnection interface and exposes
a ping method on \Doctrine\DBAL\Connection. For drivers where no
ping is supported, a \Doctrine\DBAL\ConnectionException is thrown.

- 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

disable savepoints by default, added dedicated getter/setter to enable/disable, added exceptions when trying to use savepoints when not supported by the platform

disable savepoints by default, added dedicated getter/setter to enable/disable, added exceptions when trying to use savepoints when not supported by the platform

[2.0][DDC-284] Fixed. API polish and some convention over configuration simplifications for join columns and join tables.

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removing the closing PHP tags form all php files, it\'s not needed and can break sessions which are whitespace sensitive

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