Ignores .rvmrc.
Adds RSpec dependency.
Adds a picture of a cat.

Taken from http://www.flickr.com/photos/george_eastman_house/2720791942/.
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Adds missing activesupport dependency.

A dependency on ActiveSupport is required as ActiveSupport::Concern is used.
Explicitly require active_support and image_voodoo for non-autoload envs.
Adds resize_to_fit specs.
Fixed resize_to_fit spec
Refactored resize_to_fit spec to parallel CarrierWave::RMajick tests
Fixed resize_to_fit, which was including an extra pixel for bigger
dimensions
Changed #resize_to_fill to match the same method API for the RMajick and
MiniMajick modules in CarrierWave
If the earlier behavior is needed, perhaps it could be moved into a