Add entry_points to setup.py

[delijati]

See #74

[googlebot]

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[coveralls]

Coverage remained the same at 47.182% when pulling 5f7faae on delijati:master into bc74501 on google:master.

[delijati]

I signed it!

[delijati]

I signed it!

[googlebot]

CLAs look good, thanks!

[fahhem]

Hey, how would you like to be mentioned in the CONTRIBUTORS file? I have your name from your profile, but no email. You don't have to have one in there if you don't want

[fahhem]

#85