added coverage badge to README; coveralls gem
Merge pull request #493 from lemurheavy/3-2-stable

added coverage badge to README; coveralls gem
Fix only_integer validation when locale delimiters are used.
Merge pull request #501 from GUI/3-2-stable

Fix only_integer validation when locale delimiters are used.
Added the ability to accept nested attributes
Added test for nested attributes
Changed require mocha to mocha/setup to remove deprecation warning
Removed comment
Merge pull request #505 from cwjenkins/3-2-stable

Nested Attributes
Merge remote-tracking branch 'upstream/3-2-stable' into 3-2-stable