purchase-pre_k.php returning customer form

added curriculum products directly to page if user identifies as a
returning customer.
minor edit - purchase-pre_k.php

removed stray input fields
Cart updated to use dynamic products

SESSION now stores the quantity and the price of a product and it is
pulling the price information from $DB
Added store.php and product-details.php page

Main store page and a product details page listed in the ISN Map v0.4
minor edit - index.php

cleaned up links to use <?php echo SITE_URL; ?> to ensure correct link.
AJAX Payment method changes fixed

also added ajax method to cart.php to change payment method before
checkout.
Fixed change payment method on cart.php with ajax

On cart.php you can now switch back and forth between credit card and
P.O. and it updates without a page refresh.

also included link to new checkout-cc.php page for credit card purchases
Pre-K Curriculum form

Added the correct product form for Pre-K (not connected to cart yet)
and moved the main curriculum form to Kindergarten (which is what it
was for in the first place).
Changed price-quote.php to checkout-po.php

to better distinguish the checkout cart function, renamed price-quote
to checkout and made two files for cc checkout and po checkout.
minor - added qty textfield to product-details.php
Updates made to work on the Starfall Server

Minor edits needed to make the store work on the Starfall.com server
minor - ignore sftp-config file
Revert "Updates made to work on the Starfall Server"

This reverts commit c23a8201a7c4ae66b08d243c172acdb17dc240b5.

Conflicts:
	sftp-config.json
Added one real product to $DB as a trial
Site review fixes

A lot of little fixes mentioned in my site review with Brandi. Here’s
the list:

1.1 Add EVENTUALLY to all three purchase methods (not in ally caps,
that was just for emphasis) "I want to create a Price Quote and
EVENTUALLY pay by Purchase Order"
2.1 Multiple classrooms - when “multiple classrooms” radio button is
selected, make sure the “Number of Students” section doesn’t show until
after they enter a number.
2.2 Multiple classrooms - if the number is changed, reset the form
fields so it add fields in addition to what was already there.
2.3 Number of Students section - move the "Recommended number of
products” notice from right under the section heading TO right above
the “Next Step” button, so they see it before they proceed. The notice
should say: "The recommended number of classroom kits and student kits
will be based on the information you provided.”
2.4 If the user clicks back to yes, or back to no (or changes their
mind in any other step in the form), we need to reset the form and
display only what they have currently selected
4.1 when Shopping PO is selected, change “Cart" title at top of the
page to “My Quote Preview”
6.1 let's make this an include function so we can quickly add it to
other pages.
6.2 update Kindergarten step 2 and 3 so the pm dropdown works on both.
6.3 this should also work on the product-details page and the store.php
page
7. Starfall logo - change to "Starfall Store” once we are in the
products/store (including curriculum)
8.1 Rearrange the Membership option text so the price is next to the
radio button: $70 Teacher… etc.
8.2 no ordered list, take out the numbers
9.1 DON’T redirect to purchase-method.php when clicking on simple
products. Only redirect for the Curriculum products.
9.2 ASSUME that they are using credit card until changed, either on the
purchase-method.php page or the dropdown.
10.1 quantity field should line up with button
Fix for the Payment Method drop down.
$DB populated with real products
Aligned price boxes to the right so they line up correctly.
Merge branch 'Cart-updates'