Update README.md

typo
created a callback function check for this.next() is wizard.js, if callback function is present it will only move on to next step if it returns truthy
updated karma config to include Chrome, added Chrome and PhantomJS launcher to package.json dev dependencies
created test for new next() functionality, previously added comments to code for understanding, removed logs
project build
added enter and exit validation for traversing steps that depend on information from other steps through context object
added testing for enter and exit validation
Project build
added context object
Added new step functionality and all controbuters to README.md
Project build
Update README.md
removed contributors
Merge remote-tracking branch 'upstream/master'

Conflicts:
	README.md
Removed merge conflict
Merge pull request #71 from jacobscarter/master

Created step validation on step enter and step exit
Merge pull request #49 from morenoh149/patch-1

Update README.md
Merge github.com:mgonto/angular-wizard

Conflicts:
	dist/angular-wizard.js
	dist/angular-wizard.min.js
	package.json