Main documentation (#5704)
Main documentation (#5704)

* Modified and added documentation

* Modified and added documentation

* Modified and added documentation

* Modified and added documentation

* Modified and added documentation

* Modified and added documentation

* Modified and added documentation

* Changed auth_wrapper doc as suggested by vibhor98

* Changed auth_wrapper doc as suggested by vibhor98

* Changed auth_wrapper doc as suggested by vibhor98

* Changed ui_access doc as suggested by seanlip

* Changed ui_access doc as suggested by seanlip

* Changed auth wrapper as suggested by seanlip

* Changed auth wrapper as suggested by seanlip

* Changed auth wrapper as suggested by seanlip

brianrodri/oppia,prasanna08/oppia,souravbadami/oppia,kevinlee12/oppia,brianrodri/oppia,oppia/oppia,prasanna08/oppia,brianrodri/oppia,kevinlee12/oppia,kevinlee12/oppia,brianrodri/oppia,oppia/oppia,souravbadami/oppia,prasanna08/oppia,oppia/oppia,brianrodri/oppia,oppia/oppia,souravbadami/oppia,prasanna08/oppia,souravbadami/oppia,kevinlee12/oppia,oppia/oppia,prasanna08/oppia,kevinlee12/oppia,souravbadami/oppia