Revert "add install script text for backup tool"

This reverts commit eba8f28ae1683fecde9dd81a1fc52b45dc7a25aa.
Revert "update ota_from_target_files to handle mounting/unmounting for backupscript"

This reverts commit cc343dd39fa7589802bb530aff171ffb0b79b422.
Revert "Modular backuptool.sh.  Executes backup and restore methods defined in arbitrary /system/addon.d/*.sh scripts."

This reverts commit 64641b7ee492c10b64d37b96cabdd8a174793883.
Revert "Add otapackage support for backuptool"

This reverts commit 7a31333ff283cb7f2a823203c0708f49ad92f7d1.

Conflicts:

	core/Makefile
	tools/releasetools/ota_from_target_files
add ability to remove device assertions

do this by setting adding "TARGET_OTA_ASSERT_SKIP := true" in BoardConfig.mk

Change-Id: Ia832748ddc00320e0193d93be0883f4cc9208a35

Conflicts:
	core/Makefile
	tools/releasetools/ota_from_target_files

Conflicts:

	core/Makefile
	tools/releasetools/ota_from_target_files
Port AOKP: [1/3] Install persistence support
Copy files from OUT/install to ZIP/install and extract to /tmp/install
at install time.  This is an extensible framework that may be used for
other install tasks as needed.  Note that none of the install files are
only extracted to a ramdisk, they are never written to /system.

Run script persist.sh with argument save prior to formatting /system
and again with argument restore after /system is installed.  This may
be explicitly disabled by setting TARGET_DISABLE_PERSIST := true.