 * Make the compiler generate the new, more efficient $PY.isinstance()  * Fixed bug in exception handling generation: re-throw error if no    catch-all exception clause is present.  + Added optimized code generator for "for x in range(x,y,z)" loops, as    these can be emulated as simple javascript for loops, without the need    for exception handling.
 * Make the compiler generate the new, more efficient $PY.isinstance()
 * Fixed bug in exception handling generation: re-throw error if no
   catch-all exception clause is present.
 + Added optimized code generator for "for x in range(x,y,z)" loops, as
   these can be emulated as simple javascript for loops, without the need
   for exception handling.

chrivers/pyjaco,chrivers/pyjaco,buchuki/pyjaco,buchuki/pyjaco,chrivers/pyjaco,buchuki/pyjaco