Participant sex can now be 'Unspecified'
Added ID codes for participant roles
New function for anonymizing participant information
Improved editor for participants with ability to anonymize most information.

Age is now explicit, older sessions which do not have age defined for a participant will have the age show as 'Unkown' in the editor.
Initial attempt at creating a feature based collator
Null pointer checks
Set version to 1.7.0beta3
Improvements to report UI and buffer panel/window