Check arity of #to_hash before calling. Closes #144
Fix Rubocop issues.
Preparing for release, 2.1.1.
Preparing for next development interation.
Added Hashie::Extensions::Mash::ActiveModel for compatibility with Rails 4 Strong Parameters.
Merge pull request #147 from dblock/mash-activemodel

Fixed inconsistency between Mash#respond_to? and #method_missing. Added Hashie::Extensions::Mash::ActiveModel for compatibility with Rails 4 Strong Parameters.
Reorganized extensions, consolidated Hashie StringifyKeys implementation.
Merge pull request #148 from dblock/hashie-extensions

Reorganized extensions, consolidated Hashie StringifyKeys implementation.
Upgraded Rubocop, removed broken platforms from Travis.
Put back those platforms, lets see if Travis helps us fix them.
Replaced respond_to with respond_to_missing in Mash and ActiveModel.
Spec for issue #149.
Merge pull request #150 from dblock/issue-149

Spec for issue #149.
Corrected Rubocop violation.
Merge pull request #155 from dblock/master

Corrected Rubocop violation.
Do not convert keys to strings in Dash and Trash.
Do not automatically stringify keys in Hashie::Hash#to_hash, pass :stringify_keys.
Merge pull request #152 from dblock/trash-keys-symbols

Do not convert keys to strings in Dash and Trash.
Removed inconsistent 80-column alignment.
Added Hashie::Extensions::Dash::IndifferentAccess for backward-compatible behavior.