added WIP shapes demo; improved little-dots demo
prepare sketch for a CoffeeScript rewrite

- tweaked: `README.md`, `.editorconfig`, `bower.json`, `package.json`
- rewritten build system ( `gulpfile.js`, `gulpfile.coffee`)
README.md: more clarity & structure
tweaked README.md: changed lib size

Two accommodate the upcoming rewrite in CoffeeScript, I changed the
size in `README.md` to „<10kb“.
remove old build system files

`src/header.js` and `src/footer.js` are no longer needed since we will
be using Browserify.
CoffeeScript rewrite: `core` module

The drawing part will be implemented soon.
CoffeeScript rewrite: `shapes` module

The drawing part will be implemented soon.
CoffeeScript rewrite: `util` module

The drawing part will be implemented soon.
added the `util` module again
provide an entry file for browserify

`src/index.coffee` is the entry point for Browserify.
Since sketch can be compiled with custom modules, this file gets
rewritten on every build.
added uglifyjs options for smaller `dist` files
rebuild `/dist` files
improved build system

- faster builds, because gulp doesn’t start twice
- more readable code
implemented drawing

- todo: draw rotations
- todo: draw relative child coordinates
rebuild `/dist` files
prepare modules for concatenating
prepare modules for concatenating (2)
remove index files

since the modules’ class files will be listed in JSON files
`shapes` module: added dependencies
fixed a bug in the `util` module