* Copy more files from es1 to run spidermonkey tests
* Add tools to run ECMA5-incompatible tests
- [babel](https://babeljs.io/)
- [es6-shim](https://github.com/paulmillr/es6-shim)
- [es6-symbol](https://www.npmjs.com/package/es6-symbol)
* Add src/shell/GlobalObjectBuiltinTestFunctions.cpp to add test-only functions
* 'of' should be able to be used as identifier
* Set rpath of x86 binary relative to binary path
* Remove config.h.in~ file from repository
* Fix broken build by removing third_party/libunwind