Spring Social 1.1.x Changes

Changed Serialization support from codehaus.jackson to fasterxml.jackson libraries.
Fixed dependencies to work with Spring Social 1.1.x (some may be unused, in that case you can remove them to make the package lighter)

Test classes are refactored, but not tested.

A SoundCloudProfile constructor is missing in order to complete tests. 
Implement them if you want to test the package (as far I've tested Connection)