OCD link_to spacing fixes
Link from developer/index to user/index and vice versa
Fix api creating order with line items example
Beginning of Custom Attributes Guide - WIP
Finished the custom attributes guide
Changed ordering in guide menu
Fix error with 'original' location in message.
Fix formatting.
Replaced Order Events Link image with Integration tab image in Configuration guide.
Add user section to index page
Corrections to info boxes styles
Finished the Configuration guide
Initial framework for Configuration tutorial
More work on the configuration tutorial
Intro to configuring integrations section of configuration tutorial
Fix line-wrap style issue; start on making connection for Config tutorial
Deleted superfluous config tutorial; merged extra content into config guide
Corrected wording and JSON in the Custom Attributes guide.
Put closing triple-ticks on their own lines in custom_attributes guide.
Moved more triple-ticks to their own lines.