Don't version the XPI
Fix some style issues
Fix email format
Merge pull request #2 from notabene/patch-1
longdesc tab if and only if longdesc attrib not empty
early return instead of indent as per Rik's request
if longdesc attribute longer than 0 then generate a longdesc tab - ot…
code off the top of my head, cannot test it right now, pushing 'as is'.