lots of fixes for the quake3 module including:
- rather than replacing the build.sh just patch up the including one with sed
- move the adding user to video group to configure (do we need this - this should be set up already on raspbian - perhaps better in its own module)
- use copy rather than mv for copying binaries so running twice works. Fix up incorrect wildcard quoting
- no need to rename zip. Force overwrite to avoid prompts on second run
- single chmod +x for all binaries
- make ports folder if it is missing, in case just this module was build
this set of fixes solves problems mentioned in #430