Add puavo-wlanap-dnsproxy but do not autostart it
Rename module: puavo-wlanap => puavo-wlan
Prompt for root passwd before image build
Prompt for release name before image build
Remove module: gimp

Module circumvented webmenu's launch problems, but webmenu has been
fixed and the fix released [1] so this module is now redundant.

[1]: https://github.com/opinsys/webmenu/commit/a5e3ad8b4b11604bd84dc696e3613443e01be950
Add kernel 3.10.18.opinsys1
Display vendor logo in lightdm background
Set kernel 3.10.18.opinsys1 as default