checkbox-touch:checkbox-touch.py: PEP8
checkbox-touch: Move sessionID save/restore to checkbox-touch.py

To resume a saved session we're using the session manager storageID.
This ID is now saved at python level in the XDG_CACHE_HOME/<APP_PKGNAME> folder
for touch devices and XDG_CACHE_HOME/checkbox-touch for desktop apps.
"automatic merge of lp:~sylvain-pineau/checkbox/session_id_file/ by tarmac [r=kissiel][bug=][author=sylvain-pineau]"
checkbox-touch:manifest.json: version bump (1.0)
"automatic merge of lp:~sylvain-pineau/checkbox/checkbox-touch-1.0/ by tarmac [r=sylvain-pineau][bug=][author=sylvain-pineau]"