Don't show items not available for individual sale

Fixes #10
- bad link in line item description. Shows product without add-to-cart button when applicable
add basic information about the parts of a product on the front end
[Fixes #11] - remove template from controller
fixes jquery disable in admin/products
Localizing JS for kit-making to a single view

Removing the spree_product_assembly JS from the global manifest
Guarding against breakage for projects with existing dep
Updating Gemfile + gemspec definition
Removing all unneeded files
throws MethodError order_id_equals doesn't exist, replace with where(:order_id => order.id)
Code cleanup
All tests are passing
Merge pull request #20 from iloveitaly/cleanup

All Tests Passing + Misc Cleanup
Merge branch 'master' of git://github.com/spree/spree-product-assembly