Add missing search params to root endpoint.
Update phone field settings and examples.

In the admin interface, increase the maxlength for the phone number
field to allow formatting styles that put parentheses around the first
3 digits.

Change country prefix examples to only include a number, without the
plus sign.
Simplify missing_template method.
Remove unused code and fix spelling errors.
Add support for Rack::Cache & Memcachier caching.
Remove staging.rb.

A separate environment for staging is not needed nor recommended. Staging apps should run in the production environment.

See these Heroku articles for more details:
https://devcenter.heroku.com/articles/multiple-environments

https://devcenter.heroku.com/articles/deploying-to-a-custom-rails-environment
Use hexdigest for cache key.

To make the cache key small. Problems can arise if the cache key is too long.
Merge pull request #280 from codeforamerica/update-caching

Update caching
Update Rails version in README.
Refactor layout_by_resource
Update rack-timeout to version 0.1.1
Update sass-rails to version 4.0.5
Add version constraint for jquery-rails.

jquery-rails 4.0 requires Rails 4.2 or above.
Remove duplication in funding_sources.js
Update coveralls dependencies.

For some reason, 0.7.2 isn't being installed when running bundle update coveralls.
Update spring to version 1.2.0
Update bootstrap-sass to version 3.3.1.0

Due to changes to bootstrap modals, I had to refactor the warning modals, which is a good thing because it got rid of a bunch of code.
Merge pull request #286 from codeforamerica/update-bootstrap-sass

Update bootstrap-sass to version 3.3.1.0
Ignore CSV files that are not required.

If a CSV file that is not required is either missing or present  but
empty, the import script will skip it and won’t raise an error.

If a required file is missing or empty, then the rake task will be
aborted and an error message will appear explaining that the file is
missing or empty.

Closes #284.
Merge pull request #287 from codeforamerica/fix-csv-import-script

Ignore CSV files that are not required.