fixed bugs with aggregations, udf execution, conversions and examples
fixed examples arg parsing
Added more features to the benchmark:
- ability to do heap profiling
- ability to use different key generators
- key set generator, allowing for consistent set of keys to be used during test

Exists example cleaned up.

Added more .gitignore entries.
AER-2706 #fixed - removed erroneous free
added apply.py example. added args for get.py
v1.0.13
fixed a leak with the key's digest.
fixed a leak with byte arrays. also made sure to deref unicode strings
v1.0.14
fixed leak in bins containing raw bytes (byte array)
v1.0.15
fixed memory leak related to arguments for callbacks. fixed handling of Py_None.
v1.0.16
added ability to project bins from a record read using client.select(keyt, [bin1,bin2,...])
v1.0.17
removed auth param check
passing the policy object to the get() and select() ops
v1.0.18
removed bad prints
v1.0.19