android: possible fix for bitmap recycle errors

fixed wheelup/down Wheel up and down used to be swapped in both binds.cpp and uKeys.pas (2 wrongs make a right eh) After I fixed uKeys zooming was inverted, so I changed binds.cpp too, but now existing teams will still have its zoom inverted..

add a nilcheck

checksum

Feel free to add real checksum function

better lazy loading for cScaleFactor

Ok. I think *this* should flip it correctly...

android: added an unsigned target to the makefile, to help automate signing

remove the need to qt and co when using cmake with -DANDROID=1

Minor tweaks to freezer, mostly to simplify current state to laptop

clean up pngs

merge

+ Trivial update. + Script for managing WxW, AFR, and Surf'n'Crate shoppa-variants.

A few scripts to try out. 2x challenge, 1x GSoC training, 1x user mission.

Bit more freezer.

Add an emergency return to the timebox in the case of death of rest of team. Also add a small visual effect to AI survival

Might help if this was actually its own unique weapon

Provide training/campaign with a random seed to ignore/use.

remove ProcessKdb references all together, removed movecursor() because it doesnt seem to do anything

first attempt at fixing controller/gamepad, it works with the android controller but it doesnt have hats/buttons, needs testing

dont allow choosing weapons when the AI is playing

android typo/sabotage

fix sdl13 build

readded optimization for SetScale