Added error reporting on failure to delete directory from project tree.
Added setting of margin properties to support their reordering.
Enabled `editor.autoreload` by default.
Added `hotexit` option to exit without forcing to save files.
Added saving auto-recovery record on switching from the application.
Disabled `Opt+Shift+Left/Right` shortcut as it conflicts with block selection.
Added metalua components to MANIFEST (missing in packaging on OSX).
Fixed formatting of strings including comments '--' (#335).
Fixed formatting of `until` statements (fixes #335).
Disabled re-indentation of multi-line comments/strings (#324).
Disabled smart indentation for multi-line comments and strings (#324).
Added error reporting on failure to load file from the command line.
Added support for `name:<line>` and `name:p<pos>` on the command line.
Added `onEditorPainted` event (#166).
Added document `GetFileExit` method (#166).
Added editor `SetupKeywords` method (#166).
Added package `GetUIManager` method (#166).
Added package `AddPanel` method (#166).
Removed erroneous message about failure to open '-psn...' file on OSX.

This fixes a side effect of an earlier commit (8678404b).
Added package `onEditorUpdateUI` event (#166).