Replace empty ALT text with the string 'no-alt-text'
;
Updated version string and maxVersion for new AMO release.
Cmis.io.save needs to be passed a reference to window.

If Cmis.util.target is called and opens a saveas dialog it
clobbers Service.ww.activeWindow and was preventing privacy
configuration before the save action.

Fixes #44
Added new format variables and fixed issue with %ALT.

New variables sourced from issues #34 #37 #38 and #39.