clean out unwanted modules

Leave just the PayPal Rest Model and DataSource
missed a bootstap load. fixed now
why not throw in some workshop crap too?
formulating the beginnings of a workshop plan
get a crude start to paypal payment pattern

Not right or complete, but it does get a transaction made on the purchaser's account.
Move Cart to order_items table
Stable. Console ok. Next, bake base models
Order and OrderItem bake
90% of way to first stage refactor, Cart becomes CartItem, alias of OrderItem
Get records saving. but the cart pallet flow is broken
roughly match original behavioral pattern. records are saving
Get base CRUD for generic Order

Also get automatic order numbering installed (lifted from ampfg)
probably got basic functioning. So moving on now to get Cart header in place
timekeeping hookup in blog layout
time module installation
Partial refactoring of cart
write Cart Model

* extends Order
* new maintain(), cart item maintain wouldn't work
* Purchase Component now sends Cart the Session component so it's not a recurring method arguement any more
* cartExists()
* cartId()
* count()
* retrieve()
Caching is not in place yet
simplify cart queries and clean out old cache properties

- eliminate concept of variable-containment queries
- eliminate caches that supported variable containment and cart item-counts (now handled by Cake's model counter-cache feature)
make Cart->retrieve() cache the result

- made some generic cache methods in AppModel too
cleaning up cart item, moving into add-to-cart testing