signup 6.x-1.0-rc5

Bugs fixed since version 6.x-1.0-rc4

• #533970 by dww: Fixed bug that caused the "signups" tab on nodes to generate an "Access denied" message unless the signup attendee list was configured to appear as a tab (introduced in RC4 via #529478).
• #534948 by dww: Fixed bugs where signup_confirm_email.module breaks signup_status.module due to the unorthodox way it was trying to hijack the signup form for the confirmation. Now, confirmation is handled via a checkbox (which is only shown if needed via JavaScript) instead of trying to redirect to a separate confirmation form.
• #536094 by dww: Fixed a UI bug when editing existing signups. If there was a form validation error (e.g. a required field was left blank), the form now reloads already in "edit" mode with all the fields enabled and the submit button already converted to "Save."
• #544882 by dereine: Fixed a few places that called node_load() so that they can now make use of the node caching feature.

New features since version 6.x-1.0-rc4

• #549646 by dww: Exposed signup-related node and signup data to token.module.