Update spec_helper for consistency
Merge pull request #211 from mhaskel/spec_updates

Update spec_helper for consistency
Remove documentation for deprecated $warn_message parameter

Commit 8a500af removed $warn_message.  Also remove it from the documentation
Merge pull request #212 from mattaezell/doc-remove-warn_message-param

Remove documentation for reverted $warn_message parameter
Remove dependency on stdlib4
Merge pull request #213 from mhaskel/stdlib4

Remove dependency on stdlib4