Adds type checking and naming convention.
Merge pull request #2 from dstar4138/develop

merge changes from develop branch
Update distress_API.py

Integrated with the Receipt class and cmsg wrapper, added receive and delete functions.
Made internal functions private. Refactoring needed.
Update distress_receipt.py

Rewrote a splitting function to work with Python2.
Update distress_cmsg.py

changed 'del' to 'delete' ('del' is a reserved keyword in Python)
Merge JohnDvorak/distress patch #3.