Use atom-message-panel For Error Display (Fixes #14, Fixes #3)
Replace $GOPATH Variable In `Gofmt Path` (Fixes #13)
- Show errors if `Go Executable Path`, `Gofmt Path`, or `Golint Path` cannot be found
- Remove command specific prefixes, replace with command name
- Update CHANGELOG, README for v1.0.0 release
Merge branch 'atom-message-panel'