use md5.c for computation of md5sums
create a framework for computing digests and reading digests in TWRP
add space for backwards compatibility with bb md5sum
Change-Id: Ia18e3f430eed5eba22e5052d39b9b8d88ecd4536
Update exfat to newest commits
Change-Id: If15df21a556d39e6325ca8338345b698b9d8759d
Remove mutex from file seselector

mutex would, in some rare cases fail to lock and cause a freeze
of the GUI.

Also restored some code that was removed before and should not
have been removed to fix a bug with folder selection where you
select the same file or folder twice (e.g. select a backup on the
restore page, press back, then select that backup again.)
Remove unused fonts from 320x480
Merge "Remove mutex from file seselector" into twrp2.4
Merge "Remove unused fonts from 320x480" into twrp2.4
adb: handle adbd auth in recovery mode

If /data/misc/adb/adb_keys exists, copy it to /adb_keys, set property
for secure adb, and restart the adbd daemon.

Change-Id: I795e3659203e3585d1988e074865bdb29422ad85