fixed issues in cybox core bindings
Merge pull request #11 from CybOXProject/script_email_to_cybox

Script email to cybox
added a check for the presence of the get_anyAttributes_ method before invoking it while building namespace definitions on export
Update README to include dependencies section
removing .pyc files
adding gitignore for .pyc and .swp files
Cleaned up the email_to_cybox directory. Aligned the imports with our cybox python package conventions. Removed test content