Merge pull request #8 from bworrell/master

CybOX Export
README and zip file updates

Updated the README and zip files to reflect the new version that
includes CybOX output.
README formatting
README updates
README updates
Updated regular expressions and exports to better handle [.] and [@] obfuscations.

Also updated .zip file.
Added support for OpenIOC 1.1 output.
Added exception handling if ioc_writer library is not present
Merge pull request #15 from williamgibb/master

Added support for OpenIOC 1.1 output.
Updated to reflect OpenIOC 1.1 exporting, plus small updates
Updated zip file to include OpenIOC export functionality