Make the entrypoint asn1ate available again

[rockwelln]

In the current repository state, the asn1ate entrypoint exposed by setup.py fails with the error message:

$ asn1ate nrtrde.asn
Traceback (most recent call last):
  File "/note/.virtualenvs/sandbox/bin/asn1ate", line 11, in <module>
    load_entry_point('asn1ate', 'console_scripts', 'asn1ate')()
TypeError: main() missing 1 required positional argument: 'args'

Here is a little fix to do not break what was done for the unit tests and make the command running again :-).

[kimgr]

Thank you! Can you squash the two commits into one?

[kimgr]

I'll take charge of this, will try my best to preserve your name on the commit.

[rockwelln]

Sorry, I didn't had the time to take care of this one before.
I'll have some time to look into it on Friday.

[kimgr]

Squashed and merged in 131411b. Thanks!