Add write buffer for tar writes

update fuse to 2.9.2

catch return from unlink so that we don't print error messages when things work
Change-Id: I1115039a0fa5d9d73f78ef1abd79755d7ffd9d96
Change popen in twrpTar to __popen

Change-Id: I921b0647b1f63dd348b059eb630ebe9bf5ec570d
This adds a 60 second screen timeout for TWRP. Might consider making this configurable in the future.
Will also set overlay to lockscreen so we don't have inadvetent screen selections.
Touching the screen will bring the display back up.
add back check script for poweroff
move diff time function to twrp-functions.cpp
make sure we chmod after copy_file
add read_file and write_file functions to twrp-functions.cpp
make single thread
try to force update screen
add forceRender
drop caches after tar processing

Change-Id: I3c5c509dd39dbb05451bbfe5d8b56d53c90d8d1b