Rubocop cleanup.
Lazily loading the image info - Instead of re-calling the command line on every info check.
Updated ignores.
Update travis-ci link and icon
Updated code climate link and badge
Now passing tests. Better info lazy loading.
Removing support for 1.8
Switched ree support with rbx
Updated tested versions.
Added ruby 2.1.1
Merge pull request #203 from FlavourSys/master

Fixed extracting layers from image
Merge remote-tracking branch 'upstream/master'

Conflicts:
	spec/lib/mini_magick/image_spec.rb
	spec/spec_helper.rb
First steps towards lazy running of commands.
Run commands only when result is needed.
Moved command_queued assignment to after setting the command, this is important for cases where the block access the current images properties.
Some more styling and spelling improvements.
Info initialization was missing.
Making sure tests pass.
Fixes deprecated File.exists?

Related info:
http://www.ruby-doc.org/core-2.1.1/File.html#method-c-exist-3F (In
"click to toggle source")
Let Travis test rvm 2.1.1
Merge pull request #208 from futhr/feature/deprecation-fixup

Fixes deprecated File.exists?