cubicweb-jqplot #2535351 variable name collisions in IE (at least) [done]

In IE (at least), DOM nodes with "id" attributes are visible as properties on the global window object. Since jqplot uses the same identifier to define the plot variable name and the plot's div, this leads to errors such as "object doesn't support this method or property".

done in0.3.0
load left0.000
closed by#bbc65a0ae232 [js] register plot objects in a custom namespace rather than in global scope. (closes #2535351)