v1.8.0 (2016-04-06)

• Now properly handles situations where the to-be-previewed or -opened file
  already existed in another group (#23)
• Added new setting reopen_file_in_current_group to control this behavior
• The parameter for instantly opening the most recently closed file has changed
  (see README.md if you are affected)
• Fixed a bug where the panel closed the current file if all files in the panel
  were currently open (#34) (@lastsecondsave)
• Fixed various edge cases including races in the preview involving quick-
  opening or deleting the selected entry (@rahul-ramadas)
• Only quick-open the selected entry if the caret is at the end of text
• Don't print "reloading" message during initial load
• Don't clean anonymous projects on ST3 as long as they remain open