Merge pull request #43 from AzureAD/master

pull contributing doc and changes
fix responseError for null rejection param
Merge pull request #44 from omercs/master

fix responseError for null rejection param and interceptor for rejection
fix di strict for angular v1.3 and above
merge remote changes
Merge pull request #46 from omercs/master

Fix di strict mode and tests
Merge branch 'master' of github.com:AzureAD/azure-activedirectory-library-for-js
fix version
Merge branch 'master' into dev
Merge pull request #47 from AzureAD/dev

Push to master