Adds the following options:
- start: Allows the Photostack.current variable to be set through options (useful for starting the view on a specific slide)
- showNavigation: Allows configuring whether navigation (dots) should be displayed
Wraps all calls to navigation elements in check to see if showNavigation option was set.
Adds the following public methods:
- showPhoto: Calls the _showPhoto method (useful for jumping directly to a photo)
- open: Calls the _open method (useful for manually opening the gallery via other methods)
- navigate: Calls the _navigate method (useful for manually navigating through photos via other methods)
Moves "opening" logic from initEvents method into private method so that it can be called separately.
Adds afterInit option to specify function that should fire after _init() method.
Merge pull request #2 from ericthelast/feature/add-events-and-options

Feature/add events and options
Fixes default "start" option which was incorrectly declared in options as "current".
Merge pull request #3 from ericthelast/feature/add-events-and-options

Fixes default "start" option which was incorrectly declared in options a...