[table views] closes #1986413: refactor TableView, EntityAttributesTableView, PyValTableView
See the tickets for a description of the why.
* one should now use RsetTableView instead of TableView and EntityTableView
instead of EntityAttributesTableView.
* a flexible layout object has been extracted, TableLayout
* PyVaTableView has been rewritten using the same base class / renderer
cubicweb-web: embedded-javascript-library usr/share/cubicweb/cubes/shared/data/jquery.js