Add option to only send the modified attributes
Add fix for ruby 1.8.7
Make the option work with other API's
added support for legacy ruby version gem requirements
Update her.gemspec

Add activemodel and activesupport dependency back
Merge pull request #157 from alfonsocora/send_only_modified_attributes

Add option to only send the modified attributes
There are no changed_attributes for a #find.
Set previously_changed attributes when #save is called.
Always set @changed_attributes to {} after initializing.
Fix spec indentation.
Remove duplicate condition in “or” clause
Remove redefined “respond_to?” method
Merge pull request #183 from remiprev/fix/remove-custom-respond-to

Remove redefined “respond_to?” method
Remove travis tests for ruby-1.8.7
Actually test the send_only_modified_attributes functionality
Merge pull request #184 from remiprev/fix-parse-spec

Actually test the send_only_modified_attributes functionality
Add comment in middleware examples
Show changes for a new record, but not an exiting one.
Merge pull request #182 from centro/master

Set the ActiveModel::Dirty #changed_attributes and #previous_changes correctly.
Failing spec