various updates (.htacces removed)

docs/source/access/.htaccess

docs/source/access/.htpasswd

docs/source/private/main.rst

docs/source/products/data/ingv_bvect_cses_tableset.rst

docs/source/products/data/ingv_evect_cses_tableset.rst

docs/source/products/data/ingv_lol_swarm_image.rst

docs/source/products/data/ingv_plasma_cses_image.rst

docs/source/products/data/ingv_plasma_cses_timeseries.rst

docs/source/products/data/ingv_sigma_swarm_image.rst

docs/source/products/data/ingv_te_swarm_image.rst