Added simple timing messages for when the verbose option is on. (#54)
Added simple timing messages for when the verbose option is on. (#54)

Should help for quick and simple profiling when developing new features.
Also helps new users understand what is happening and get a sense on the
magnitude of time that SWITCH spends in each process (model creation,
instantiation, solving and post solving).
time.time() is used to measure wall clock timings of each block.
bmaluenda/switch