add three people. update copyright date to 2013.
add google code uploader script. for uploading binaries / releases
dont crash if there's no .netrc file. add security notice. discourage .netrc use.
Merge pull request #239 from openscad/google_code_uploader

Google code uploader
doc length tested ok. remove FIXME note
Merge branch 'master' of github.com:openscad/openscad into colah_highlighter