Distribution and Release process

Hey @maxfell,

I've refactored the grunt process as discussed.
Please review the changes, so we can fix if there's something missing/broken.

Add a later point in time we could generate the (src/hoodie.scss) and (dist/hoodie.scss) files, or maybe just use the old text replace task for these files only.

And we have to fix the sourcemap as the paths referenced there are currently not the right ones (I guess).

Travis/Release setup is almost done, but I couldn't enable the repo and add the encrypted token as I need admin (vs. push) right to do that.

Best,
Stephan