Partial rewrite

• Moved /config/hooks to /config/openvpn/hooks
• Renamed /config/openvpn/server to config
• Changed base image to slocomptech/baseimage-alpine
• Moved all helper scripts to /root/usr/local/bin
• Got rid of bash lib files
• Hiearhicaly moved all commands under the hood of ovpn command
• Improved backup command
• Added restore command
• Changed base image
• Added armhf build