Added first_block method.
Simplified; auto load first block.
Fix pending improvements to model & block
Renamed
renamed to xtal.cif
Better index
Minor tidy
Removed
Merge branch 'master' of https://github.com/natechols/xtal.js

Conflicts:
	js/map_viewer.js
	js/xtal.cif.js
Merge
Renamed a few files
More renames
Added 'loop to list of dicts' method

Also renamed xtal_cif_block -> Block, etc. Prefix not needed since we
have it wrapped.
xtal.model ns
Test parser