svn-2620: Bugs

[HaJo]

svn-2620 looks quite playable (make it RC4!), but still has some bugs:

* When a research-project gets finished, "Notice: Build lab first" is shown
* The hired Scientists go away (you have to unhire + hire them again)

* The Soldier-count gets out of sync, if you unhire a soldier that is assigned to the team
* The kill-count for soldiers is not saved

* I found a red "out of ammo" Kerrblade on an alien. See issue 1539176,
https://sourceforge.net/tracker/index.php?func=detail&aid=1539176&group_id=157793&atid=805242

* On explosions, the aliens die before the impact of the rocket or grenade
 see issue 1539172 on sf.net,
 https://sourceforge.net/tracker/index.php?func=detail&aid=1539172&group_id=157793&atid=805242

* base/sound/ambience/jingle2.wav : invalid filetype - should be jingle2.ogg

And some missing models / pictures
(Workshop, Workers, Medics, Non-biological-Scientists ...)

[Bandobras]

Nice to have you here. I'll check those, though I'm still working on your 1537118.

[Bandobras]

* I found a red "out of ammo" Kerrblade on an alien

will commit a fix today

* base/sound/ambience/jingle2.wav : invalid filetype - should be jingle2.ogg

fixed in revision 2666

The rest I leave to others...