update to version 2.08

add changelog to app, update build scripts and apk

update apk

update gradle file, add some launcher images and update apk with newe…

…r build

update apk and manifest to v1.95

update apk and version to 1.91

update 2048 submodule with own fork and update apk

make screen 'rotatable' only on tablets

make screen 'rotatable' only on tablets