Return empty json for settings and keymaps when file doesn't exist or on error
Replace BufferChangedCallbacks to BufferObservers in frontend code (#427)
Moved packages from 3rdparty/bundles to packages/
Remove unneeded libs
Placed all bundles in packages folder
Changed every mention 3rdparty/bundles forlder to packages
Added User folder for user specific settings and etc
Merge branch 'master' into buffer_observer

Conflicts:
	frontend/html/main.go
	packages/Diff.tmbundle
	packages/ini.tmbundle
	packages/monokai.tmbundle
Merge pull request #449 from MontakOleg/buffer_observer

Replace BufferChangedCallbacks to BufferObservers in frontend code (issue #427)
Merge pull request #448 from trapgate/master

Resolve #25: Implement the find_next command