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Update README.md
chmod
add upload specs, fix some problems, add testing for different
mongoid
unneeded file
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remove debug output, don't test on mongoid 3.0
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Merge branch 'master' of https://github.com/rs-pro/rails_admin_settings

Conflicts:
	lib/rails_admin_settings/types.rb
	lib/rails_admin_settings/version.rb