improvements in dataimport.py * updated the docstrings * fixed small issues in ucsvreader_pb * help user in using RQLObjectStore

add missing semi colon in js

[book] some more documentation and cleanups * merged existing facets documentation with the one I've just written and put almost everything within the code * added a note about __depends__ and __recommends__ and about the recommends semantic (extracted from a post on the ml) * added a note about write security checking (extracted from a post on the ml) * fixed some dumb sphinx errors