Added Serializers for BigDecimal, JodaDateTime and UUID
Removed JodaTime and its serializer.
My compiler was not able to deal these casts by itself.
Merge pull request #148 from pfrolim/master

My compiler was not able to deal these casts by itself.
Merge pull request #123 from kramer65/master

Serializers for UUID and BigDecimal
Use StringBuider.
Add gradle wrapper.
Merge pull request #140 from yongjhih/index

Support Column.index
Throw a runtime exception instead of silently failing when the
framework encounters a model with no default constructor.
Merge pull request #138 from JDeuce/feature-add-exception-on-no-default-constructor

Throw a runtime exception instead of silently failing when the
Support Column.uniqueGroups