General clean up. Embed images. Add icon macro.

Fix wonky section numbers.

Complete lab 12

WIP lab 12.

Improve some bits that caused problems for students.

Move files into correct location

s/JDBC/JDBI/

req.param -> ctx.path

Add generated saleId back to sale. Add missing @Override.

Fix missing " in nav menu

Complete lab 11

Add HTTP auth to reference

Final tweaks after working through lab myself.

Fix nav menu and formatting.

Fix typo in formatter code.

Add a quick section on totals

Add clarification about passing product to the buyProduct function.

Typo fixes.

Forgot to add section on formatting numbers - fixed.

Complete lab 10

Improve sections that students had problems with.

Update build.gradle based on recent problems that students have had

WIP lab 10

WIP lab 10

Several fixes and improvements

Various fixes ...

* Removed left-over angular instruction.
* Adding warning that we need to use beta version of Vue plugin.

Add warning about NetBeans showing errors Vue library.

Complted lab 9

Correct static path

Fix missing 'ctx'