bugfix
add link to GitHub contributors
reference to esReader
refer to RStudio
no more .tar.gz archives on GitHub
GitHub instead of website and Twitter notifications
clean up contributors
Merge pull request #58 from johnmyleswhite/website

Website updates
add reference to GitHub issue tracker
Merge branch 'master' into v0.5-rc
Merge branch 'v0.5-rc' into v0.5-rc-full