Updated project build process and minor fixes

[cppctamber]

Build

• Converted .beautifyrc to .eslintrc format and removed the original file
• Put .babelrc options into webpack.config.js and removed the original file
• Added eslint-loader so that eslint could be added to the webpack build process (lint and formatting)
• Added uglifyjs-webpack-plugin and fixed the problem with minification on gl-matrix so the ccpwgl_int.min.js now builds
• Added progress-bar-webpack-plugin so build progress is more obvious in the console
• Added watch script which rebuilds the dist files on the fly (run with npm run watch)
• Upgraded webpack to 3.5.1
• Rebuild dist files
• Updated README.md

Fixes

• Rolled back normalization of Tw2Curves length properties as they are defined in some .red files and the changes caused issues with some explosions
• Added some imports and one export which were missed during the conversion to webpack
• Fixed some basic linting issues and a typo
• Disabled eslint rules on base classes

[filipppavlov]

Have you pulled most of your changes yet? I am slowly starting to work on updating ccpwgl with new assets (probably for March or April Eve release) and I don't want to create conflicts for you.

[cppctamber]

Not really no :( Its taking me a lot longer than I was expecting as I'm having to cherry pick specific things from my version which means I have to rewrite and test stuff all over again. I'll speed it up!