Added comments to each domain class

Also removed some unnecessary parentheses from domain constraints.
Changed activity date occurred to use muted

Changed activity date occurred to use muted class to provide color,
rather than a custom CSS class.
Changed sys env link to button style

Changed the deployments link for system environments from a standard
link to a mini-button. This helps differentiate it from the existing
links for deployment environments.
Changed color of active links

Changed color of active links to red so that the active links stands out
more.
Changed messages about permissions to muted
Added copy to clipboard capabilities

Added a new tag that makes it possible to copy chunks of text to the
user's clipboard. This utilizes ZeroClipboard. It is currently used to
copy a deployment's binaries source value to the clipboard, but can be
used in other places.