Closed #2287 Wired up a compound toggle in the tax rate settings UI
Experimentally updated menus

"Orders" replaces "Shopp", "Shopp" replaces "Setup"
Testing new "currency note" icon for "Orders"
Updated Orders icon to an S-labelled "coin"
Fixed PHP notices
Added Markdownr classes
Fixed screen id references
Closed #1950 Added Admin Developer API
Added WordPress admin dashboard controller
#2289 Added settings screen help
Coding standards fixes
#2208 Added compound tax control in tax rate settings UI

Also added help button for setting up local tax rates
Closed #2205 Added shopp_pre_resession, props to Aaron Campbell
Closed #2290 Added DateRange library to consolidate code

Consolidated code from orders.php, customers.php and reports.js

Additionally, fixed the Customers Manager Screen Options column hiding functionality.
Fixed #2292 Regression caused by Admin Dev API refactoring