load jquery without overriding $ from prototype

function converted to jquery should use IIFE like:

(function(C2C, $) {
...
})(window.C2C = window.C2C || {}, jQuery);
Merge remote-tracking branch 'origin/master' into jquery
Merge remote-tracking branch 'origin/master' into jquery
Merge remote-tracking branch 'origin/import-carto2013' into jquery
use jquery instead of prototype
use jquery instead of prototype
small enhancements to jquery versions
more improvements

there is no need to check for jQuery object's length, because if the
searched element doesn't exist, jQuery object is empty, and prepend is
never called
use jquery with the different mayouts + forums
d3js as submodule
use jquery instead of prototype
html5shiv as submodule
use jquery instead of prototype
use jquery instead of prototype
use jquery instead of prototype
shorter function call
- use jquery instead of prototype
- rename function for switching date display
use jquery instead of prototype
use jquery instead of prototype
Merge remote branch 'origin/master' into jquery