Persephone SFV2

Ima write down the effects in changelog instead of the technical stuffs. For commit history check my git.

Changelogs:

• battery life improved

• VPN malfunction fixed( bbr->westwood)

• Fingerprint driver improved

• kernel size reduced to 16 mb

• Removed lots of debugging and useless stuff

• disable all useless network scheduler and use fq-codel (the best)

• cpu boost turned off

• Lots of minor changes