[2.0] fixes #2478 Now PersistentCollections may contain NEW elements and track policy monitor them when flushing on DEFER_IMPLICIT mode

[2.0] fixes #2478 Add/persist/retrieve was doubling the resultset of collection is solved. It was a merge in PersistentCollection creation. I am not 100% sure it is the right patch, but it works and does not break any other unit tests

[2.0] Added missing connect() call in Connection:quote, which was throwing E_FATAL when using DQL. Thanks Damon Jones for the report

[2.0] Fixing spacing and adding precision and scale in Annotations driver. Also introduced options item in Annotation and Yaml mapping drivers. Missing XML driver implementation.

[2.0] Fixed issue with RunSqlTask. Added basic support to --update in SchemaToolTask. Misses some internal implementation

[2.0] Updating sandbox cli to use APC again but adding comment to use ArrayCache if APC is not available

[2.0] Changing sandbox to use ArrayCache by default so it doesn't require APC. Added comment with APC as the recommended for production

[2.0] Updated description for pear packages. Enhanced ClassLoader to support the old namespace separator (underscore) for Zend/PEAR/... compatibility until some day when they all use 5.3+.

[2.0] Work on CLI: Added SchemaToolTask with preliminary support for dropping/creating the database schema. Prepared the sandbox. Adjusted build to include the sandbox.

[2.0] Various necessary fixes and adjustments for oracle as well as fixes for better handling of temporal types. Closed #2452.

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