Add remaining credit to credit notes
Merge branch 'credit_note_remaining_credit' into myfork
Rails 4 no longer includes ActiveSupport::Memoizable
Merge pull request #82 from isaac/rails4

Rails 4 no longer includes ActiveSupport::Memoizable
Ignore Extra Development Paths
Version bump to 2.15.4
Regenerate gemspec for version 2.15.4
Version bump to 2.15.5
Regenerate gemspec for version 2.15.5
Added Invoice#approve - marks an invoice as approved
Rename delete_or_void_invoice! to change_status!
batch_save should return false on server-side errors.
Fixed NoMethodError if  is nil.
Merge pull request #94 from fimmtiu/batch-save-validation-errors

batch_save should return false on server-side errors.
Don't use the parent to choose XML node names.
Fixed model definition test.
Merge pull request #96 from fimmtiu/fix-child-xml-nodes

Don't use the parent to choose XML node names.
Fixed test broken by PR 96.
Merge pull request #97 from fimmtiu/fix-line-item-sum-test

Fixed test broken by PR 96.
Allow allocating credit notes.