Remove references to `this.model`

Fixing anti-pattern
Update 09-exercise-3.md
Update 18-appendix.md
Taking a stab at finding words that seem a bit more appropriate:
"allowing the user to work on other parts of a page without interaction" --> "allowing the user to interact with other parts of a page without interruption"
fixing what appear to be copy-and-paste inflicted typos
Update 03-internals.md

The comment was incorrect. The event is in fact triggered for the time, and afterwards the function incrA is responsible for triggering the event once more.
Insert heading between solution descriptions
Put file globs in code spans

Depending on the renderer the asterisks may be interpreted as markdown characters
and alter the style of the text (and in some cases make the asterisks disappear).
Include localstorage alias in function arg list
Update broken link to blog post resource

Blog/repo has been moved/reformatted
Remove semicolon from inside object literal
Merge pull request #595 from rwstauner/patch-5

Remove semicolon from inside object literal
Merge pull request #594 from rwstauner/patch-4

Update broken link to blog post resource
Merge pull request #592 from rwstauner/patch-2

Put file globs in code spans
Merge pull request #590 from rwstauner/patch-1

Insert heading between solution descriptions
Merge pull request #589 from ohvitorino/gh-pages

Update 03-internals.md
Merge pull request #587 from pearcemerritt/typos-found-while-reading

Typos found while reading
Merge pull request #586 from ogonkov/patch-1

Remove references to `this.model`
Update 07-common-problems.md

Fixed bug with link to Marionette chapter
Merge pull request #596 from 1st/patch-1

Update 07-common-problems.md