Fix issue with slider only cycling through 3

[popcorn245]

The carousel will only loop through 3 photos unless I made this fix. Hope this can make it into the repo so others don't suffer the same fate. Thanks! ^_^

[pedroabreu]

What was the change/fix ? Can't really see the difference in the PR

[popcorn245]

var slidePosition = lastSlideIndex + '>' + currentSlideIndex;

Without this fix the slidePosition varaible is unset and causes the carousel to only go through 3 images at a time. Other one just fixed the .gitignore so it ignores your .tmp directory. You also need to wrap this in a try/catch so it doesn't cause an error when someone navigates away from the page where this gallery exists and doesn't use the modal.

scope.$on('$destroy', function() {
    _modal.remove();
});