Quickly install from last install path

This patch stores the last path a zip was installed
from and adds a menu option to jump there quickly
when installing new zips.

Patchset 1) initial commit
Patchset 2) remove un-need call to dirname()
            increase install_menu_items[] size
Patchset 3) removed use of stat
            more install_menu_items[] changes
Patchset 4) removed unused variable info
Patchset 5) removed unused variables
            general clean up

Change-Id: I02d2fde26b375fad36dbab50ec2a8b8a52afc003
Merge branch 'cm-10.2' of github.com:CyanogenMod/android_bootable_recovery into cm-10.2