Bower

This merge request moves all previous versions from `dist/` into `dist/allversions/` except for `dist/latest/` which is the one that `bower.json` points to. The reason for moving them into `dist/allversions/` is to make it possible to ignore them for the bower package, since you want a minimal package there.

I haven't published it on bower yet, because the `bower.json` needs to be on the master branch first. When it's there, it's as simple as running `bower register dexie git@github.com:dfahlander/Dexie.js.git`.