Merge pull request #47 from BaBuDe/master

Add real images for training set and update headers
added tutorial view as slider
tutorial slider: add header, img placeholder, navigation
changed ionic version to implement slide-box
changed rating from (1,-1) to (5,1) to be consistent with our back end
tutorial boilerplate added
removed tutorial cards from the code
replaced the hamburger icon with three differnet icons
added go back button
add default route to fall back to
better confirmation button and text
changed header color, bg color, and label for beers
added edit mode icon
added tutorial view
Merge pull request #49 from neillobo/switch/APIv3

changed rating from (1,-1) to (5,1) to be consistent with our back end
Merge pull request #50 from dhfromkorea/add-tutorial

added tutorial boilerplate at /tutorial route
change
Merge pull request #53 from dhfromkorea/tutorial-view

added tutorial
changed rating from (1,-1) to (5,1) to be consistent with our back end
change