Format according to rustfmt guidelines

[sashahilton00]

These changes were generated by running cargo fmt --all against the project. Will let Travis build to confirm all is good, then merge.

[plietar]

Can you update .travis.yml to test this

[sashahilton00]

@plietar it looks to already do checking to a certain extent. https://github.com/librespot-org/librespot/blob/master/.travis.yml#L25

I'm running fmt in stable rust atm, Do you want me to just modify the travis script to run cargo fmt --all -- --write-mode diff for all rust versions except 1.20.0?

[plietar]

I thought stable didn't work yet (#159).
I'm just talking about changing --package=librespot-core to --all

[sashahilton00]

It doesn't work yet, in the sense that one gets the warnings, but since they're warnings, it's not going to cause a build to fail. Still, will leave it as nightly only until it's fully compatible with the stable release. Will push a commit for the travis update in a bit, just working on #130 atm.

[sashahilton00]

Will rework this once #166 is done