Adding an event to key off for package state changes (closes #36)

Not sure if this is the best way to do this but it seemed to be the easiest way for now. This will at least patch the potentially harmful ability to be able to install packages multiple times.
Merge branch 'master' of github.com:bjtitus/settings-view
Using Package Manager events
Forgot theme-install-failed event
cleaning up styles
3 per row themes
merging master
Add packages quick filter
enable fuzzaldrinfor
fixing little artifacts under line two
Merge pull request #65 from atom/bar-styles

Cleaning up Settings-View
Only show array editor if all values are strings

Config values where objects were nested in arrays were being corrupted
since toString was being called on objects when setting the text of the
editor.
Prepare 0.90.0 release
completely remove panel when uninstalling package
Merge pull request #73 from atom/izuzak/fix-reinstall-package-panel

Completely remove settings panel when uninstalling a package
Merge pull request #48 from dotcypress/feature/packages-search

Add packages quick filter
Use fuzzaldrin 1.x
Map over panel menu children
Don't show editor until panel is initialized
Append core panels in order