* Disable BROWSER env var
Right now the browser helper script does not actually work. It seems
safer to skip this until we can fix it.
* Bump to 4.0.2
* Update changelog for 4.0.2
I updated the CodeTogether description to include some enhancements that we just shipped in CodeTogether 4.2. I also added a bit more detail to the feature list and provided some hyperlinks in a couple of places where people would likely appreciate more detail.
I made no changes to the other sections.