angles: initial commit

The angles package is required for the tf package.
tf: initial commit
rostest: rostest depends on rostest-native (resolves #83)

The rostest package requires that the rostest executable can be
found by cmake's find during configure. Hence, rostest depends on
rostest-native.
To implement this, rostest and rostest-native are defined with
different dependencies.

This commit resolves issue #83.
python-catkin-pkg: updated from 0.1.8 to 0.1.16 (see #99)

The current catkin requires catkin_pkg >= 0.1.12 as indicated in
https://github.com/ros/catkin/blob/groovy-devel/package.xml.
See discussion in #99.

lb: minor tweaking and commit message rewording

Signed-off-by: Víctor Mayoral Vilches <v.mayoralv@gmail.com>
Merge remote-tracking branch 'origin/master'