Changed LLDBPlugin to cpp

As the LLDBPlugin is C++ it makes sense to have the main file as C++ also
More work on LLDBPlugin

* Built latest version of LLDB.Framework and include with plugin in order to not have to submit the whole LLDB (+ LLVM) plugin that is required to build the code

* Added all headers needed for the plugin and LLDB

* Added some very very basic debugging usage (untested so far) in the start function