Fix for issue #9 (thread local exceptions)

The most important part can be found in:

https://github.com/vidakovic/spring-data-orient/compare/noskovd:master...master#diff-2c0de7381eec1b65b7344d63cadbe219R79

The rest are more or less cosmetics. I updated also some dependencies:
- Spring version 4.1.3.RELEASE
- Spring Boot version 1.2.0.RELEASE
- JOOQ version 3.5.0

The rest is just minor logging stuff OrientTransactionManager.