Merge pull request #214 from koriroys/spelling

Grammar and spelling fixes, explicit error for expect block.
Replace Blogger model refs with Author.
Correct grammar and add more explanation.

In Rails 3.2.x (https://github.com/rails/rails/pull/1437) when `.new` is
called on a model collection, the new object is added to that same
collection in-memory. Demonstrate this behavior over several sections to
illustrate why this is a problem.

Move to 'haml-rails' updating the generators to produce Haml.
Add protection for Tags#destroy.
Merge pull request #215 from cupakromer/51369b4

Misc spelling, grammar, and inconsistency update
Outline for today
Outline
Outline for this afternoon's demos
Adding link to today's outline
Update master
Update master
Update master
Update master
Merge pull request #217 from wengzilla/patch-5

Update master
Summary
Merge branch 'master' of github.com:JumpstartLab/curriculum
Update master
Update master
Rough outline
Merge branch 'master' of github.com:JumpstartLab/curriculum