cleanup: Remove some unused defines.
Fix GUI bug where scav button pretends to be clickable even when not the host.
Add two new directives to campaign definition files: 'loading' that gives a level
file to read, and 'package' that gives a .wz file in campaign folder to mount. Campaign
definition files can now also be read from 'campaigns' in the user write folder.
Merge branch 'bugfixes'
Remove useless imdRot variables for display3d.cpp -- from Safety0ff/gfrcyp
Remove unused variable and unused include -- from Safety0ff/gfrcyp
Various small fixes -- from Safety0ff/gfrcyp
Remove useless flattening of delivery points to terrain. (As a
side-effect of this, the vertex limit for models has been removed.)
Change locate mouse in 3D function to not rely on static global. Finally remove tileScreenInfo.
Make smooth water bed generation, instead of random jitter. Patch by NoQ.
Revert "Implement a smooth riverbed generator."

This reverts commit 2cbdf60a2af829e0b66a335648fdad4d73f063e0.
Merge branch 'master' of https://github.com/Warzone2100/warzone2100