add missing `all_models` parameter to AUTOLOAD
restore old create_html_snippet

reiplemented in terms of new embed API, need to deprecate as well
some variable renames for consistency
restore build_gallery embedding

still uses create_html_snippet, should reimplement in terms
of new embed API
remove some annoying console messages
fix test against inline resources for autoload_static
tweak console logging
Update build_gallery.py to use new embed API

Also remove _PLOTLIST hack since it is no longer needed
Merge pull request #613 from ContinuumIO/static_embed_fix

Fix static embedding (and gallery build)