Fix RedisAscoltatore and default options to {}

[davedoesdev]

Closes #82.

[davedoesdev]

Travis build failure is process out of memory when running coverage!

[mcollina]

Could you please try to restarting the job? Maybe it was a travis failure or something.
I seem not able to restart it, as it's in your repo.

[davedoesdev]

Still fails. Tried make coverage on my machine and the memory usage is large indeed. I'll see if it's this change which is making the difference (virt 2.4Gb, res 1.6Gb).

[davedoesdev]

Seems it must be this change as your repo is coveraging fine. Strange thing is the the tests don't even start - I see no mocha output.

[davedoesdev]

So coverage runs fine if I check out my master separately but as soon as I link in node_modules to the new mosca then it fails.
I think istanbul is getting confused by the links or something like that.

[davedoesdev]

Yes, it's

(cd node_modules/mosca/node_modules && rm -rf ascoltatori && ln -s ../../.. ascoltatori)

which causes it. Maybe latest istanbul gets confused by circular links.

[davedoesdev]

OK that did work - build now fails for expected reason (mosca overlapping topic failure), which will be fixed with mosca pull request when it works on 0.8...

[davedoesdev]

mosca pull is ready: moscajs/mosca#63

[mcollina]

Ok, merged in Mosca's master. Merging this in ascoltatori.