add bay and 4 bay elements scaffold with db schema
merge .gitignore on github.com
change simple_form input html
revised db schema, add demo data for bay editor
initial nested_form for bays/open_shelves
add jquery-ui gem
add jquery/jquery-ui to app
add bay/edit form with open_shelves
fix type error and add seeds: db schema of table open_shelves
add seed for various types of bay
fix js bug for accordion for html.erb changed
finish coding add/remove elem of bay editor
modify rear_support_bars' schema & chests' models, update db & seeds
minor changes: add js.log, html beautify
remove level from bay elements, judge by from_base
coding notch_num related inputs hide/show, js
validates models, refine elements' template
modify deprecate helpers: button_to_function, link_to_function
fixed accordion heightStyle bug, add new shelf name
rewrite to onclick=removeElement..., export coffee function