[2.0] DDC-365 -  Added tests for several missing column types - also showing that decimals come and go correctly into the database.

[2.0] DDC-169 - Changed AbstractPlatform and AbstractSchemaManager and children to accept Table, Index and ForeignKey instances for the respective create*() methods.

[2.0] DDC-169 - Converted introspection queries of all platforms to return Column, Sequence, Index, ForeignKey Schema Instances instead of arrays, heavily pimped Oracle support thereby.

[2.0] - DDC-169 - Completed refactoring of SchemaTool::getCreateSql() to use new DBAL Schema API, several internal optimizations in SchemaTool are now possible. Stripped out shared functionality with getUpdateSql() so that this part of SchemaTool is still completly working with the old API.

[2.0] Fixed DDC-101, DDC-102 - Ensure defaults for string length and field nullability are handled consistently in both update and create schema commands of SchemaTool.

[2.0] DDC-84 - Add Mysql Platform unittests for incremental changes of the metadata for the schematool update function. Fixed some quirks in the Unit-Test suite alongside, Fixed changes of length in SchemaTool update.

[2.0] Made MySqlPlatform default to innodb table engine. Some cleanups while investigating the optimistic locking failures.