commit: small changes on abiword.desktop

Merge with no strings from RedHat (why don't they send this upstream?)
Change order of stuff (as translations start to appear, they clutter
useful info if it's not on the start)
Add Mime Type definition (to support near future changes on nautilus).
We should define some Mime Type, or set around using an existing one.
CVS:
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-- 
+ No matter how much you do, you never do enough -- unknown
+ Whatever you do will be insignificant,
| but it is very important that you do it -- Gandhi
+ So let's do it...?
Please AVOID sending me WORD, EXCEL or POWERPOINT attachments.
See http://www.fsf.org/philosophy/no-word-attachments.html