0.6.0

Added

• Signal handling to gracefully exit on SIGINT and SIGTERM.
• docs: Contribution guideline along with commit template.
• Service call to load initial joint states from parameter server.

Changed

• Set GUI default to show info overlay and hide UI1.

Fixed

• Fixed publish rate of camera images (#22).
• Now publishing clock on reload.
• Fixed memory leak caused by missing deallocation of opengl contexts on reload.
• Cameras now publish their first image at timestep 0 instead of waiting for t = 1/pub_frequency.

Refactored

• Deprecated getEnv, getEnvById, and unregisterEnv functions.

Contributors: @DavidPL1, @lbergmann