apply some pull-requests and do some improvements with javascript file-structure

- DenJohX / charisma
	- OK: BUGFIX: modal is now visible on screens < 480px; https://github.com/DenJohX/charisma/commit/d1c684f9655cf0ee8445eaa91d6f60acba13e5ff

-
- bigblind / charisma
	- OK: accessibility ftw (added labels to make this login form accessible); https://github.com/bigblind/charisma/commit/090d00bd8899ab8bbf8a4505e8cdb5f10335b5e9

-
- sergiosaint / charisma
	- OK: Update jquery.flot.pie.min.js; https://github.com/sergiosaint/charisma/commit/7730971a48d5a21a4877b0fecfa56733eb511ce9

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- j3nda / admin-template-charisma
	- improvement:
		- OK: js/3rdparty/bootstrap-*.js -> js/3rdparty/bootstrap/*.js
		- OK: js/3rdparty/jquery.flot.* -> [only minimize by google-closure]