Merge pull request #5 from charleskorn/master

Minor formatting and grammar changes and clarifications for parts 1 and 2
Add region disclaimer
Fix minor spelling error
Fix up region specific text
Fix #3 with updated AMI ids
Fix AMI ids in part four
Make headings and capitalisations consistent
Fix #4 by adding domain/depends in templates
fix #4: value for Domain needs to be lowercase vpc
Merge pull request #6 from flosell/vpc-in-lowercase

Fix #4: value for Domain needs to be lowercase vpc
fix #4 in app-server-template.json
fix #4 again: this time we don't need a dependency to the GatewayAttachment since the VPC isn't defined in this file
Merge pull request #7 from flosell/part-four-eip-fix

Add Domain-Property in app-server-template (#4)