Merge pull request #43 from spderosso/master

fix
A large number of changes, including:
- new Alloy instances with an e-mail application example
- changes to the text
- cleanup in the Alloy code
Edited the text to replace existing Alloy scenarios with a more concrete example.
Added clarifications to CORS section
Further clarifying edits to the sections on Techniques for Bypassing the SOP
Fixed the section on SetDomain
Other minor grammar and spelling mistakes
some changes