remove debian directory from master
ping_gateway now uses the provider gateway defined in config file.
attempts to stop exisiting instances of openvpn when discovered at start up.
added skeleton for generic client wizard flow
moved srp registration to base

and some minor changes in wizard, like textentry for provider.
Merge branch 'feature/detect_and_stop_vpn' into develop
Merge branch 'develop' into feature/generic-wizard
catch cert verification errors and ask user for trust

with a little helper function using gnutls
openvpn commands cleanup
logic for cert validation widgets in wizard
add more digest functions

separate get_cert and get_fingerprint functions
added separator
download ca cert from provider
ca cert fingerprint check + api cert verification
srp authentication class + useful decorator
add bug number in log for #638 cases (domain name mismatch)
added docs
connecting page

and changes to functions having to do with  the default
path to certs.
add bypass for already trusted fingerprints
password confirmation
allow to test auth from cli