Itoolkit

- Cleanup Python packaging
- Fix PEP8 deviations
- Cleanup iLibCall transport C code to support 64-bit XMLSERVICE once it is fixed
- Add TravisCI support and unit tests
- Reorganize transports under unified package:
- itoolkit.lib.iLibCall -> itoolkit.transport.DirectTransport
- itoolkit.rest.iRestCall -> itoolkit.transport.HttpTransport
- itoolkit.db2.iDB2Call -> itoolkit.transport.DatabaseTransport
- Add SSH transport itoolkit.transport.SshTransport
- Allow iPgm.addParm to pass options to iParm

- Removed a debugging print statement

Major changes to iDB2Call:

- Allow users to pass in a PEP-249 connection object, which is now the recommended method
- Use ibm_db_dbi instead of ibm_db directly
- No longer connect/disconnect during call(), only connect at init time (if applicable)

- Add iODBCCall transport
- Fix iSrvPgm to pass iopt flag to super class 12
- Use new-style classes on Python 2
- Add --disable-libcall option to setup.py
NOTE: To install via pip, run `pip install --global-option=build_ext --global-option='--disable-libcall' itoolkit`
- Add documentation via Read the Docs: python-itoolkit.readthedocs.io

- iLibCall fix UnicodeDecodeError: ascii codec cannot decode byte 0xc3

Initial BitBucket release