mattt/sinatra-param — pull request #27 by spagalloco (2014-02-14 21:01:40+00:00)
Title: allow defaults to be defined as procs

I recently had a need to define a default via a proc and thought this would be a useful addition. The basic usage looks like this:

```ruby
param :year, Integer, default: proc { Time.now.year }
```

Non-proc defaults are obviously still supported. I also found some test failures while running the specs and fix that as well.