website: document Homebrew installation process [GH-227]
Merge pull request #244 from henrikhodne/hh-homebrew-docs-website

website: add documentation on installing through Homebrew
website: nitpick alternative installation methods
v0.2.3
up version for dev
builder/amazon/all: address feedback for ami tag refactoring change

Use explicit name for Tag field and note tags added in the ui.
Update packer.go to cleanup plugin clients on exit. 

Since defer does not fire when exiting the application with os.Exit we need to be sure that we cleanup all of the clients on failures from the CLI and creating a new environment object.
Merge pull request #255 from johnbellone/patch-1

Update packer.go to cleanup plugin clients on bad CLI exit.
website: add myself to the community page
Warn that ec2-bundle-vol may ignore some important files
common: functions for template processing
common: support user data
common: validation and generating unique template names
common: clone template during validation to avoid unnecessary children
builder/amazon/common: access config uses template processing
builder/amazon/common: RunConfig to template processing
builder/amazon/ebs: process templates for config
builder/amazon/chroot: switch to new template stuff
builder/amazon/ebs: get rid of unnecessary template
builder/amazon/instance: switch to new template stuff