EC2 on Rails 0.9.7 released

[Paul Dowman]

The image id's are ami-5c0aef35 (32-bit) and ami-540aef3d (64-bit)

The main changes are:

* memcached installed, and capistrano tasks now support a new role named "memcache". Memcached won't run on hosts that aren't in the "memcache" role.
* New Capistrano task ec2onrails:get_public_key_from_server to copy the public key file from the server before first use.
* cap ec2onrails:server:install_gems can now install a specific version of a gem instead of the latest (use "gemname -v version" instead of "gemname" in deploy.rb)
* Now automatically runs hourly, daily, weekly and monthly scripts in current application's script directory, they run as "app" user, with $RAILS_ENV set.
* Support for different named rails environments (e.g. "production", "staging1", "staging2"), the current environment name is defined in /etc/mongrel_cluster/app.yml
* s3.yml now supports multiple sections for different rails environment names
* cap ec2onrails:server:upgrade_gems now does "gem update --system"
* Added admin user to adm group to allow read access to syslog without using sudo
* Added "sudoers" group, if you add named administrator accounts, add them to this group
* Set PATH and RUBYLIB in /etc/environment, removed and disabled $HOME/.ssh/environment because it's no longer necessary
* Removed rfacebook gem
* Fixed bug #16423: "hostname defined in deploy.rb shouldn't have to match what the instance thinks it's hostname is"