.osx: Don’t send Safari search queries to Apple
.osx: Make Yosemite Safari more useful
Use `brew.sh` instead of `Brewfile`

Also, remove `Caskfile` since I didn’t use it.

Closes #428.
.bash_profile: Support multiple hosts in SSH completion

Useful in cases such as:

```

Host vm1 vm2 vm3 vm4
     Host localhost
     # ...
```

Simply adding a `-` to `tr` fixes this.

Closes #437.
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  .bash_profile: Support multiple hosts in SSH completion
  Use `brew.sh` instead of `Brewfile`
  .osx: Make Yosemite Safari more useful
  .osx: Don’t send Safari search queries to Apple