Add more return value encodings. Missing implementation. #11
Implement finding of -init method for constructor call, #11.

At wrapper-creation, the protocol is searched for init methods. If none are found, -init is used. If one is found, it is used. If multiple are found, -init is used too. The selector is sent as data to the constructor callback.
Replace v8::Handle with v8::Local in L8, as v8::Handle will be obsolete in future versions of V8. #11
Remove namespace prefixing of V8 and use ‘using’ instead, to clean up code.
Remove messy L8 test file