Create directory only if it doesn't exist.
Add rstudio notebook visualization app.
Fix rstudio proxy location.
Switch to our fork of galaxy-rstudio.
Replace hardcoded IPs with $host variable.
Add shed_tool_conf.xml workaround.
Upgrade to Ubuntu 14.04 and refresh.
Simplify startup.

- Drop startup-custom.sh and rename startup-basic.sh to startup.sh.
- Relocate startup.sh from GALAXY_ROOT to /usr/local/bin.
- Enforce su to galaxy in entrypoint rather than startup.
Remove some unnecessary files.
Use COPY instead of ADD where appropriate.
Merge calls to apt-get and sort packages.
Point style alias at the canonical location.
Add expiration header for scripts.
Generalize serving files out of plugin dirs.

From https://github.com/bgruening/docker-galaxy-stable/blob/latest_2014.10.06/galaxy/nginx.conf#L57
Switch from 'stable' to 'latest_2014.10.06' branch.
Force init of tool_conf.xml and document.
Refresh image.