Remove devel/py-ctypes (only needed by and supporting python24).
Remove PYTHON_VERSIONS_ACCEPTED and PYTHON_VERSIONS_INCOMPATIBLE
lines that just mirror defaults now.
Miscellaneous cleanup while editing all these files.
pycassa is a Cassandra library with the following features:
1. Auto-failover single or thread-local connections
2. A simplified version of the thrift interface
3. A method to map an existing class to a Cassandra ColumnFamily.
4. Support for SuperColumns