Increase step smoothing to fit 1:1 stairs (works well on slabs too)

Signed-off-by: Craig Robbins <kde.psych@gmail.com>
Fix Android main menu crash, and user data directory check.

Signed-off-by: Craig Robbins <kde.psych@gmail.com>
Only set the camera update keymap when using a debug build

Signed-off-by: Craig Robbins <kde.psych@gmail.com>
Fix some undeclared global variables
Wieldmesh: don't force anisotropic filtering on, instead disable mipmaps

This should fix #1844. Thanks to oleastre for making the first version
of this commit (#1848).
added enable_build_where_you_stand option

Signed-off-by: Craig Robbins <kde.psych@gmail.com>
EMF_USE_MIP_MAPS was introduced in Irrlicht 1.8, don't use in 1.7.3 or below

This is not optimal as it will cause minor graphical glitches for
Irrlicht 1.7 users, but at least it fixes the build.