make more subtle inline highlighting
Remove depricated code moving towards final 1.0 atom api
Merge pull request #278 from park9140/remove-deprecated-code

Prepare for Atom 1.0 by removing deprecated code

Fixes #278
Merge pull request #275 from park9140/redesign-highlights

make more subtle inline highlighting
:memo: Fix stale comment
Fix infinite bottom panels bug

Introduced by #278

Test Plan:
Checked that the status bar works properly when it's set to display all errors.
Also checked when it's set to display only for the current line. Seems to work.