Plot.r :
modified so that print statements show up with RServe
also wrapped all of the plotting calls with printing statements, so that the graphics shows up properly with RServe
a check is added to see if a gating set named G already exists, if it does, then the gating set is not read again

begin.html modified to become more robust to unusual scenarios of enabling/disabling modules

OpenCytoVisualization.js :
Refactored the way lists are displayed, making the comboboxes display properly in FireFox
Refactored the slider and the associated checkbox so that they display nicely in FireFox
Setting up infrastructure for RServe functionality
Applied a fix, so that the study variables combo box is not cleared each time it is clicked, by providing a 'beforequery' even listener
Added to the store filtering LABKEY.QueryKey.encodePart() so that in our case / are encoded properly