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.

\.svn
^build$
^dist$
\.pyc$
\.pyo$
\.bak$
\.old$
\~$
\#.*?\#$
\.swp$
^doc/book/en/apidoc$