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.
Add status bar summary
Fix specs
Subview for status bar summary + clean