closes #5934

* Get rid of early pathname requirement
* Use require_relative where approciate
* Drop unused files
* Imported new application.rb, environment.rb and environments/* from fresh Rails app
* Cleaned up boot.rb
* Load config in boot.rb
* Deduplicate environments/integration*.rb
* Move username blacklist into defaults.yml
* Ruby 1.9 Hash syntax everywhere
* Reorganize lib/diaspora/markdownify to match conventions
* Get rid of full path requires where possible
* Add dummy content to production section diaspora.yml.example to prevent warning
* Drop sqlite? method
* Move postgres? method into ConfigurationMethods
* Drop token authentication from User

* made configuration loader indepenent of rails
* corrected mismatch between example and default config (server.db/server.database)

* Throw away old system
* Add new system
* Add new example files
* Replace all calls
* add the most important docs
* Add Specs
* rename disable_ssl_requirement to require_ssl
* cloudfiles isn't used/called in our code
* since community_spotlight.list is only used as enable flag replace it with such one and remove all legacy and irelevant codepaths around it
* die if session secret is unset and on heroku
* First basic infrastructure for version information