cookpad/chanko — pull request #31 by yoshiori (2013-04-22 09:38:32+00:00)
Title: Add Support 'none' to active_if

And add support nested 'any'

## usage
``` ruby
active_if none(:false, :false)
# true

active_if none(:false, :true)
# false
```

## spec
```ruby
any
returns true if at least one of conditions is true
none
returns true if all conditions are false
When using 'any' and 'none'
'any' in 'none'
returns negatived result of inner-expression
'none' in 'any'
uses none(:true) as false
more nested
should be true
```