additional block per section mail layout

* added new page layout
* activated option to add custom page parts
added capistrano
more wholesome Capistrano deployment - first attempt
more wholesome Capistrano deployment - second attempt
more wholesome Capistrano deployment - use rvm1/cap3 gem
more wholesome Capistrano deployment - harmonized .ruby-version with Gemfile requirement; let Capistrano ask for Postgres user password
Debug output of viewport size in footer
new banner design with ubdated cog logo and improved scaling depending von viewport width; introduced block-based page layout
* moved capistrano dependencies to a new 'deployment' group
added config switch to squelch 'enforce locale' warning
added references to Refinery and Rails in the layout footer