Debugging pegleg can currently be difficult and the Click CLI does not
easily allow debuggers like pdb or PyCharm to use breakpoints. By moving
all CLI command calls into singular functions, we can easily create an
"if __name__ == '__main__'" entry point to call these functions and
investigate any bugs that may arise.
We also gain the ability to reuse more portions of our code by
refactoring these methods.
Change-Id: Ia9739931273eb6458f82dbb7e702a505ae397ae3
fff70ad861