fix the null pointer exception on recyclerview layout at rooms fragment

[RishabhRawatAndroid]

Fix the issue #43

[manav-mj]

You have changed a lot of things not related to the issue.

1. Changes in AuthenticationActivity.java
2. Changes in gradle
3. Changes in DashboardFragment.java
4. Changes in SettingsFragment.java

I think a separate issue should be created for every bug

[RishabhRawatAndroid]

@manav-mj Yes, brother but this is stable code for all fragments. Means if we are using the Fragment (Non-Activity) and if we want to bind the view on Fragment then we should use the ButterKnife.bind(this, view); that's why I put this in all fragments class for no more future error.

[manav-mj]

Yes your code is stable and is required for further bug fixes to be implemented.
I am just suggesting to open different PR for every change (or) change the title of the issue you are addressing mentioning all the changes you intend to make for better and clearer documentation

[championswimmer]

way too many things changed in single PR. please do not do like this.
target one pr at a time. make changes only related to that issue