Merge pull request #96 from s2gatev/fix-pluralization-issue-in-solutions

Fix pluralization issue in solutions
Merge pull request #94 from s2gatev/fix-show-hide-links-in-solutions

Fix show/hide links in solutions
Lock rails_autolink to 1.1.0

There appears to be a huge performance regression introduced in v1.1.1
in the email auto link regular expression. See here for more info:
https://github.com/tenderlove/rails_autolink/issues/34
Catch LoadError in spec.rake

This is a bit more flexible than checking the Rails' env. It's also
consistent with the approach already present in cucumber.rake.
Forgot to add a require statement in spec.rake

It's needed for the change in 9bab90e7 to work.
Add a script to deploy all course sites in one go

I need this as a convenience when deploying critical hotfixes.
Update rails_autolink to the latest version

Keep the minimum version requirement in the Gemfile, though, as v1.1.1 till v1.1.4
have a major performance regression. See e85e4e3ca for more info.