npm out of sync with latest code

[patorjk]

I installed this library with npm and noticed the transitions between slides didn't work in Chrome or FireFox (but they did work in Safari - I was on a Mac when doing my testing). I did some digging and found this thread:

#154

In there the issue is fixed with this pull request:

omervk@5c1ee86

I checked the library I got from npm and it didn't have those updates. I looked at the code in this repo and it seems to have those updates. I added them in and now transitions between slides seem to work. Another side note, I don't see any slide transitions when I look at your official demo:

http://jmpressjs.github.io/jmpress.js/

It's version of the code seems to match what's in npm.