The old Ant build system has been deprecated for a while and new development is focused on Gradle.
I also removed a hardcoded string that lint caught and moved the patch files to a subdirectory.
I left the JNI files in the root directory.

Copy only minetest_game to apk by default
Don't copy .git and .svn folders to apk
Fix bouncing asset copy scrollbar due to long filepaths
Reenable font scaling to fix broken menu on high dpi screens
Implement minetest loglevel to android loglevel mapping
Disable touch digging while moving around

There have been plenty of ppl involved in creating this version.
I don't wanna mention names as I'm sure I'd forget someone so I
just tell where help has been done:
- The partial android versions done by various ppl
- Testing on different android devices
- reviewing code (especially the in core changes)
- testing controls
- reviewing texts

A big thank you to everyone helping this to be completed!