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.
Added documentation for upgrading.
Corrected README, requires Hashie namespace.
Use semantic versioning, bump to 3.0.

Closes #157.
Just build latest rbx-2.
Handle nil intermediate object on deep fetch
Add test for missing key on deep fetch
Merge pull request #159 from stephenaument/deep_fetch_nil

Handle nil intermediate object on deep fetch
Allow IgnoreUndeclared and DeepMerge to be used with undeclared properties.
Removing unused and deprecated spec.opts

spec.opts is deprecated since Rspec 2 according to: 
https://github.com/rspec/rspec-core/blob/master/features/Upgrade.md#rake-task
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This will be version 3.0, not 2.2.
Documented hashie_rails.
Upgraded to RSpec 3.0.
Remove active record specific extensions as they are moved to hashie_rails