MetaCall v0.1.15 [2019-11-27]

• Trying to solve rpath problem with node_port respect to metacall distributable.
• Add dynamic flags for fork safety initialization.
• Disable node default exports tests until bootstrap.js implements this feature.
• Change some extra shebangs from python to env python.
• Update all python shebangs.
• Deleting old C rpc_impl to CPP
• Used proper metacall api function
• Add test for default exports in NodeJS.
• Update compile options in msvc to properly build in release mode.