Update strings.xml

Updated Chinese Translation
Merge pull request #45 from liveasx/patch-3

Update zh-CN translations
Updated Japanese Translation
Updated Russian translation (by michfood@XDA)
Move reboot button to separate row

... for small screens/lengthy translations
Revert back to static BusyBox for ARM processors

It seems that the linker on some ROMs is buggy (or at least incompatible).
No reports for x86 so far, so I keep the dynamically linked BusyBox for
now.
bump version to 2.3.1
Merge branch 'master' of https://github.com/rovo89/XposedInstaller