Remove database.yml from .gitignore

It's needed to be able to install the repo locally, and it doesn't contain any sensitive info.
Add Linux installation notes to README
Change API links to point to ohana-api-demo
Autoload the API documentation and update copy
Allow clients to specify per_page parameter
Upgrade grape-swagger gem to 0.7.2
Merge pull request #149 from codeforamerica/upgrade-swagger

Upgrade grape-swagger gem to 0.7.2
Update README with link to demo website
Add example application.yml and update README
Update README to use rails s

So that we don't have to change the README if we ever change servers. rails s will always work, whether we're running unicorn, puma, or passenger.
Add database config for vagrant
Update README with link to dev box
Remove --quiet flags from scripts

Bundling can take a long time, and it's helpful to see what's going on
Make import rake task at least twice as fast

Temporarily disable Elasticsearch indexing callbacks during bulk data import. This tremendously speeds up the import, by up to 3x according to my initial tests.
Merge pull request #150 from codeforamerica/disable-callbacks-during-import

Make import rake task at least twice as fast
Update ancestry gem to 2.1.0
Update grape gem from 0.6.1 to 0.7.0
Remove kind from locations

Kind was an attribute we used for San Mateo County data that included more than just human services. Since Ohana API is mainly focused on human services, it makes sense to remove the kind field.
Update grape-entity gem to 0.4.2
Update newrelic_rpm gem to 3.8.0.218