afterslime: add stuff outside of megaarmor area, fix minor item misplacement.
Added stuff outside near the megaarmor ![xonotic20150906190527-00](https://gitlab.com/xonotic/xonotic-maps.pk3dir/uploads/
75c96e4c13f53bbb0397b4310374e8ca/xonotic20150906190527-00.jpg)
![xonotic20150906190504-00](https://gitlab.com/xonotic/xonotic-maps.pk3dir/uploads/
0b13b1a7c7afca3c5ac500cbcd148be8/xonotic20150906190504-00.jpg)
![xonotic20150906190451-00](https://gitlab.com/xonotic/xonotic-maps.pk3dir/uploads/
3a5dfc5b30bb3e73249a409a9c0648e5/xonotic20150906190451-00.jpg)
Also fix items being a little misplaced (before-screenshot): ![xonotic20150906191116-00](https://gitlab.com/xonotic/xonotic-maps.pk3dir/uploads/
3ff85a02be7e54b2d9a17dbaf1f2ac59/xonotic20150906191116-00.jpg)
See merge request !34