added test for private class variables
implemented append, array_pop, end for wrapped python dicts/lists
added test for end on empty py list
fixed w_False to correct space
Fixed translation errors
implemented isset for pypy bridge lists and dicts
several bridge fixes:

- call an embedded python method on a PHP class
- lookup static member from PHP class from within Python
added failing test

calling a php method that uses $this from within another Python method doesn't work
added test for private class variables
Merge branch 'pypy_bridge_dict_append' into pypy_bridge