Only show member's image if it exists

Introduces webmock for testing
Add timestamps to all tables that don't have it
Cache a small piece of the members index page as a test
Use memcached for caching (via the dalli gem)
Add memcached as requirement in README
Programmatic specificity of project names
Namespace thing in memcached with the project name
Send devise emails using the background queue
Remove old PHP assets from public directory
Add caching to selectively displayed person image
Only display member image when it exists on the members page
In development and test always show the member images even if they don't exist
Set expiration time on photo cache of 1-2 days
Change policy description field from binary to text. Fixes #567
Change binary fields to text in divisions table
Install simple_form
rails generate simple_form:install --bootstrap
Move policy create form over to simple_form
Move error into a flash
Upgrade simple_form to rc for better bootstrap compatibility