Upgrade to 0.5.7

Hi!

This just upgrades the version, fixes a few other issues, and (because I'm OCD) makes everything pretty looking.

I made an alternate AUR package with these changes that you can find [right here](https://aur.archlinux.org/packages/influxdb-updated/) and see if everything is working correctly. Once this is merged we can just update yours and I'll remove mine.

Also, I ran into [this issue](https://github.com/influxdb/influxdb/issues/412) while setting this up. Ultimately everything works, but just FYI.

Thanks!