Fixed compatibility with node 12

• Now RFLibs are linked statically avoiding to install library system-wide.
• Improved documentation + added experimatal support for autoRecovery.
• Now the library is compatible and tested with node lts versions: 8 , 10 , 12
• Added travis automatic build to test compilation in all supported node versions.
• Fixes in v8 data conversion using isolates and Nan helpers.
• As nan-marshal is not updated the module do not depend on this module anymore: Nan-marshal code is included with the project as a header file and has been adapted to have compatibility with node 10 and 12.