Add noop mode

confd now supports a noop mode via the `-noop` commandline flag and
`noop` configuration setting.

Noop mode will process all template resources, but stop short of
updating target config files.
Bump version to 0.2.0
Add mailing list link
Add IRC info
Add support for SRV records
The etcd scheme is configurable
Update README with new config options
Remove ConnectSecure parameter from the confd type
Update README, order config docs
Add an example usage of SRV records
Update example usage of SRV records
Move community info down one section
Move configs to separate package.
Fix broken config package test
Move etcdclient and template_resource to their own packages
Rename template_resource* source files
Remove useless test
Add missing copyright notices to source files
Code cleanup and update comments
Don't use single letters for command line flags