Update system_tune_on_init.sh

Code style fix.
Update sbin/ext/post-init.sh, code style fix.

used http://www.shellcheck.net/
Update /sbin/ext/cortexbrain-tune.sh, fixed code style and errors!
Merged latest CM10.2 (4.3.1) BootBin and ADB binary's
Update install.sh

Code Style fix.
busfreq_up_threshold on wakeboost to 25, user reported SODS with 23.
Fix Install script to resetore STweaks and SuperSU.
Small non critical corrections to kernel apps install.
Tune the freq_step after CPU govs stability restore. profiles will reset!