Add group execute permisions to shader and asset folders.
Add group execute permisions to shader and asset folders.

jessdtate/SCIRun,moritzdannhauer/SCIRunGUIPrototype,jessdtate/SCIRun,ajanson/SCIRun,jcollfont/SCIRun,moritzdannhauer/SCIRunGUIPrototype,jcollfont/SCIRun,jcollfont/SCIRun,jcollfont/SCIRun,ajanson/SCIRun,collint8/SCIRun,collint8/SCIRun,collint8/SCIRun,moritzdannhauer/SCIRunGUIPrototype,jessdtate/SCIRun,moritzdannhauer/SCIRunGUIPrototype,collint8/SCIRun,ajanson/SCIRun,jessdtate/SCIRun,jcollfont/SCIRun,moritzdannhauer/SCIRunGUIPrototype,ajanson/SCIRun,jcollfont/SCIRun,collint8/SCIRun,ajanson/SCIRun,jessdtate/SCIRun,moritzdannhauer/SCIRunGUIPrototype,ajanson/SCIRun,jessdtate/SCIRun,ajanson/SCIRun,collint8/SCIRun,jessdtate/SCIRun,jessdtate/SCIRun,jcollfont/SCIRun,collint8/SCIRun,collint8/SCIRun,moritzdannhauer/SCIRunGUIPrototype