Add version number to header. Closes #459.
Add version number to header. Closes #459.

pandaproject/panda,datadesk/panda,datadesk/panda,pandaproject/panda,NUKnightLab/panda,pandaproject/panda,PalmBeachPost/panda,NUKnightLab/panda,ibrahimcesar/panda,ibrahimcesar/panda,PalmBeachPost/panda,ibrahimcesar/panda,pandaproject/panda,datadesk/panda,ibrahimcesar/panda,NUKnightLab/panda,PalmBeachPost/panda,pandaproject/panda,NUKnightLab/panda,PalmBeachPost/panda,newsapps/panda,datadesk/panda,datadesk/panda,ibrahimcesar/panda,newsapps/panda,PalmBeachPost/panda,newsapps/panda,newsapps/panda