Enable setting page view template by default.
Merge pull request #2331 from refinery/enable_page_layouts_by_default

Enable setting page view template by default.
Fixed spelling error in contributing.md

Changed 'Plase' to 'Please'
Merge pull request #2334 from shivamd/master

Fixed spelling error in contributing.md
Changed expired Ruby Version Manager(RVM) URL in Installation Prerequisites guide

The previous URL (https://rvm.beginrescueend.com/) no longer exists. I have changed it to point to (https://rvm.io/rvm/install)
Merge pull request #2335 from shivamd/master

Changed expired Ruby Version Manager(RVM) URL in Installation Prerequisi...
Made logic more positive.
Don't allow failures on rbx anymore.
Merge branch 'master' of https://github.com/refinery/refinerycms