Add example commands

[cflsjt]

I think it might be good to take common NGS data set insert size and create some examples for commandline....for later but is also good if we end up having Phil and Darrell running this not so far down the track

[timothymillar]

Better docs added in #45 and #52

Should add a notebook that runs through test data as an example

[timothymillar]

@cflsjt @DarrellL @Pippa759NZ going to get you guys to review the docs at some point

[Pippa759NZ]

Will take a look this afternoon