FIX: angular.js need to be angular.min.js

- angular.js need to be angular.min.js as it looks from the bower package.
ADD: "Copy link to clipboard" for whole gist

- Add button for "Copy link to clipboard" whole gist url, not only url per files in gist.

Closes #102
FIX (gists pagination): Fix regex only matching a single digit

Regex stopped matching at the first digit, it now matches the entire number
fixed the app not showing more than 270 gists

the problem is that if the user has more than 10 pages, the api doesn't
return links to every page, it just returns the link to the final page.
Like:  <https://api.github.com/gists?page=46>

This means we need to iterate all pages, until we reach that number.
removed log
cleanup of unneeded code