A few grammar and flow suggestions.
Fix bug in running HTML with multiple script tags
Second editing pass over chapter 12
Fix shift-up/down in the editor
Second editing pass over chapter 13
Correct master
Update octopus graphics, more definition
Remove illustration in intro chapter
Remove leading doctype from html examples
Half of chapter 14
Finish first draft of chapter 14
Update 02_program_structure.txt

small typos
Update 03_functions.txt

corrected function name from wrapNumber to wrapValue;
Fix two more unrecognized emphasis spans

Check for this pattern in make test.

Issue #25
Edits in response to tech review of chapter 1
Add half of level 15
Force iframes into standards mode (about:blank may be quicks mode)
Most of chapter 15
Update 04_data.txt

entry++ is more common usage?
Running word was duplicated on chapter 03