Add timer unit argument for output time granularity specification

[cshaley]

Example test run: In:

def m():
    return [0]*10**8

In: %lprun -u 1e-3 -f m m()

Out: Timer unit: 0.001 s

Total time: 0.363548 s File: Function: m at line 1

Line # Hits Time Per Hit % Time Line Contents \============================================================== 1 def m(): 2 1 363.5 363.5 100.0 return [0]*10**8

Solution to #97

[caethan]

I like it! Can you update the docs to specify that the -u option takes the value in seconds?

[cshaley]

@caethan Just the readme? Those are the only docs I can find, and many of the arguments are not documented there either...

[caethan]

I just meant the docstring.

[cshaley]

Ok done.