Big refactoring that introduces RiakMeta[T] and adjusts everything to fit
Renamed a meta
Removed outdated design notes
Reimplement the old VClocked versions of store(..) using RiakMeta
Added TODO about implementing the ping and stats calls at the RiakConnection level

Although stats is gong to be tricky with its 50 individual values
Made the default SprayJsonRiakValueConverter a low priority one to make it easier to add your own custom converters
Updated section title
Moved RiakIndex to its own file
Commented out most of the WIP index stuff while I refactor the Converter/Serializer stuf

The whole RiakIndex thing forced me to have another look at how values were (de)serialized since somehow serialization also had to provide a set of indexes and that didn't work very well with the current design. That is now in progress
Commenting out the SprayJsonConverter stuff while I refactor the whole converter system
Cleaned up unused imports
Refactored the Converter system into a simpler Serializer/Deserializer system that just focusses on the transformation of T => (String, ContentType) and back again.

Unit tests for the basic serialization support classes are WIP while I go and get some sleep
Merge remote-tracking branch 'origin/meta-and-new-serializers'