This is at least needed when adding a autoincrement column

- 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

Choose between TINYBLOB, BLOB, MEDIUMBLOB and LONGBLOB based on the length of the field.
Behaves the same way as the TEXT type declaration.

This should be 65535 (2 ^ 16 - 1) in stead of 65532.
Modified docblock to show the max lengths.

Default table collation changed to `utf8_unicode_ci`, as it handles properly a much wider array of characters (Cyrillic, for example) at a generally negligible cost of performance.

[DBAL-166] Default MySQL to UTF8/utf8_general_ci. Allow to set default table options from SchemaConfig.

[DBAL-237] Fix bug when removing and adding an index on the same columns that may be part of a foreign key.

[DBAL-220] Add support for Index flags and implement support for SQL Server CLUSTERED/NONCLUSTERED and MySQL FULLTEXT.