Changeset 2e9455f for examples/example_scripts/python/abac_attr.py

1) added namespace
2) tweak ?This,
3) allowing linking role/oset as constraining conditions
4) adding access_tests regression testing that uses GENI's access policy
5) added couple multi contexts regression tests
6) add compression/uncompression calls to abac_encode_string/abac_decode_string
(libstrongwan only allows 512 char for attribute rule storage)
7) add attribute_now option to creddy that takes a whole char string for attribute
rule