Aerospike

- Implemented support for global policies through the client config.
- An AS_BYTES_BLOB will be set to a bytesarray if no deserializer is set.
- **Note:** the signatures for the following methods have been modified to make them more consistent: get_nodes(), info(), info_node(). See: [aerospike.Client](https://pythonhosted.org/aerospike/client.html?highlight=info#aerospike.Client.info)

- Upgraded to C client 3.1.8
- Fixed [Issue 38](https://github.com/aerospike/aerospike-client-python/issues/38)
- Fixed [Issue 40](https://github.com/aerospike/aerospike-client-python/issues/40)
- Fixed [Issue 41](https://github.com/aerospike/aerospike-client-php/issues/41). The [increment()](https://github.com/aerospike/aerospike-client-python/blob/master/doc/increment.md) method is **modified** to reflect the behavior of the C client (aka _upsert_)
- Fixed bugs where batch-operations were not showing the digest part of the key tuple. **Requires server version >= 3.5.3**

**Features**
- Upgraded to the C client 3.1.2
- Removed dependency on Lua as a prerequisite.
- CentOS 7 support.
- Large Data Types added.
- Documentation and examples enhanced.

**Fixes**
- [Issue 32](https://github.com/aerospike/aerospike-client-python/issues/32) Fixed. Unicode strings [work](https://github.com/aerospike/aerospike-client-python/blob/master/examples/client/unicode_smiles.py) as input to the various methods.
- keyword args for put() changed to ‘meta’ (not ‘metadata’) and 'bins' (not 'record') for API consistency.

- Expanded the API documentation
- Tied the Python client to a specific version of the C client (currently 3.0.94)
- Fixed bug in Unicode string handling