Added specified ACL Interface methods. Added comments following PEP-257 docstring convention.
Added specified ACL Interface methods. Added comments following PEP-257 docstring convention.

ohaz/amos-ss15-proj1,ohaz/amos-ss15-proj1,ohaz/amos-ss15-proj1,ohaz/amos-ss15-proj1,ohaz/amos-ss15-proj1,ohaz/amos-ss15-proj1,ohaz/amos-ss15-proj1,ohaz/amos-ss15-proj1