Nesim type

[sanjayss34]

Allow user to provide types for one or both names in NESim.compare()

[danyaljj]

Thanks @sanjayss34 !
Two minor comments:
Could you please update the readme as well? (i.e. examples where we use NESim and how to enter the new arguments, possibly with a few examples).

[mssammon]

Looks good, but one minor request: please fix the indentation (if you look at the file on the github web site you will see that your changes don't line up). You should be able to fix this from the command line, in the module directory: mvn formatter:format

[mssammon]

LGTM.