Fix extra hyphen in --ec-2-tag-filters

Should be --ec2-tag-filters.
Added note about creating target/hello.war file

That probably needs more explanation, or just checking the war file in.
Added note about using CloudFormation instead
ignore-hidden-files doesn't take a parameter
Error parsing parameter revision

"Error parsing parameter '--revision': Invalid JSON:"

Looks like it should be --s3-location instead
Merge pull request #1 from maymount/master

Misc. Fixes and Comments