Run `rvm rvmrc to .ruby-version`
Merge branch 'make-rvm-version-file-compatible-with-other-version-switchers'
Migrate to .ruby-* rvm versioning.
First approach to steps re-design.
Provide active|inactive, done|not-done classes in steps.
Get rid of _step and _problem partials, use one partial instead.
Let POW use new .ruby-* configuration.
Get rid of "well"s on opinion pages, use generic _item instead.
Fix problem with "done" state being always present.
Merge branch 'redesign-problems-show-page--steps'