Added support for Sketch 45 update plugin feature

Added support for Sketch 45 update plugin feature
The new Sketch 45 supports new plugin update method. This fix should add support for updating this plugin automatically with the new Sketch app. #4

Add support for returning to previous location

Add support for returning to previous location
After loading a bookmark, you can return to the previous location using the shortcut fn + 0 . Note that this only stores only one location from where you last load a bookmark.

Bugfix and documentation improvement

Bugfix and documentation improvement

• Removed duplicate command to save bookmark 3 (thanks @azhsetiawan)
• Added documentation about Sketchpack installation
• Added version history

Initial release

• Initial release
• Fixed keyboard shortcut listing