===== Errors and Known Solutions =====
If you get the following error:
<code>ImportError: "from catkin_pkg.package import parse_package" failed: No module named catkin_pkg.package</code>

Make sure that you have installed "catkin_pkg", it is up to date and on the PYTHONPATH:
<code bash>
$ pip install catkin_pkg
</code>
----
Error: 
<code>ImportError: No module named rospkg</code>
Fix:
<code bash>
$ apt-get install python-rospkg
$ export PYTHONPATH=$PYTHONPATH:/usr/lib/python2.7/dist-packages
</code>
This is kinda a hack, haven't bothered to figure out how to properly install python-rospkg to the proper python location for indigo

----

If you get this error:
<code>ERROR: the following packages/stacks could not have their rosdep keys resolved to system dependencies: ardrone_autonomy: Unsupported OS [mint] </code>

when running any rosdep command, add the flag ''--os=ubuntu:trusty'' to the command.