fix bug #750: workaround GL2 function params const-iness issues with pas2c

fix condition

transpose atlas sprites where necessary

add function to retrieve texture data

fix buffer sizes

fix gear lookup allocated on stack

ship the atlas to the gpu

add an empty texture constructor

Move messages queue to hedgewars-engine-messages lib

merge 1.0.0 beta 1 into ui-scaling branch

implement empty gear lookup entries

add gear lookup to the physics processor

No longer explode dying hogs that take damage

Remove hardcoded default gamepad bindings They just cause too much confusion and there is no way the player can disable them. Done because a player complained about exactly this

Prevent saving of demo after /lua command was used Done because demos are unable to record any manual Lua command atm.