* Lint error corrected
* test improved
* lint error corrected in test file
* readme corrected
* test improved
* test of document page history workflow added
* CI error corrected
* dreipst comment
* Migration to new api improved in model's file and data tag remove in xml file
* code totally migrate to odoo 9.0 api
* test bug fixed
* test error fixed
* Lint error improved
[IMP] - Improved views to match document_page improvements.
[IMP] - Added notification to followers when a new version is approved.
[ADD] - Updated document_page_approval pot and added es translations.
[IMP] - document_page_approval: Updated spanish translation.
(../7.0pageapproval/ rev 1)
fix status bar in page approval
(../7.0pageapproval/ rev 2)
change approval workflow in page history and started to add showing approved page in normal page
(../7.0pageapproval/ rev 3)
show last approved content and aproved by
(../7.0pageapproval/ rev 4)
Fix bug on page creation
(../7.0pageapproval/ rev 5)
add status in history tree view
(../7.0pageapproval/ rev 6)
add a need approval field and hide the workflow when no approval needed
(../7.0pageapproval/ rev 7)
add access validation to approval
(../7.0pageapproval/ rev 8)
give rigth to Page aprover group on the page_history model and hide the button for unallowed group thought the security isn't enforced a the orm level
(../7.0pageapproval/ rev 9)
made invisible the prover group when not needed
(../7.0pageapproval/ rev 10)
add email to aprovers group's members
(../7.0pageapproval/ rev 11)
