Add results plot and accomplish the user interface.
Add results plot and accomplish the user interface.

results plot:
* plot the results with X axis as commit_time, Y axis as best_execute time.
* save plot locally in format .png, and the figure's name is the branch name,
  which are to be improved.

interface:
* The option -r is changed for the same as timmit.

yuancheng2013/pythran-replay