Extend 255 char limit on submitted checkout form data value. Fixes Issue 181
Whoopsie.  Coding with 4 screaming toddlers.
WPSC_CORE_THEME_PATH already has a backslash.  When this was used, double-slashing occurs.
First pass at fixing issue 359
Flushing transients beforehand to ensure we get the proper path, also, whitespace.
Add custom JS event for when variations are selected