[selector] allow inplace operator in selector computation
Intended to facilitate overriding of existing selectors chain in view declaration.
It make the code shorter and clearer when you've to import long module pathnames
Add a basic script to compare the db_schema to the fs_schema.
Allow SchemaViewer to be used without a request object Most use of self.req have
been hidden in method that fallback on a simple behaviour when no req are
provided.
Several element have been sorted to ease comparison.