YAML is just too easy to get wrong

closes #8132

It doesn't add any security to have this encrypted, but it adds
complexity for podmins, because they need to backup the key.

closes #8014

closes #7787

closes #7744

Although this is contrary to rails best-practises, we cannot provide a schema.rb that works for both MySQL and PostgreSQL, so we have no choice. Our migrations are maintained, so it should always be possible to get back to a "clean" database schema anyway.

[ci skip]

Signed-off-by: Lukas Matt <lukas@zauberstuhl.de>

Drop right side bar, move content to left side bar

Move user avatar and name from the left nav bar to the left of the publisher

See

- http://openid.net/specs/openid-connect-core-1_0.html#ClientAuthentication
- https://openid.net/specs/openid-connect-registration-1_0.html#ClientMetadata

- Add foreign_keys
- Remove unused classes/methods
- Fix pronto errors
- Add method to retrieve client id from name
- Remove TODO comments
- Fix unnecessary private key generation

- move mobile icons to mobile-folder, so they aren't included in the
  icons-sprite
- move logos to branding/logos, and create a logos-sprite without the
  big other branding-images
- delete duplicate images

closes #6004

This allows us to reuse any CSS we have, unify
their look and unify their look with the regular
page design.

This works by instantiating ActionView and rendering
templates in a rake task.

Inspired by the errgent gem.

try working around precompilation bug by committing generated sprites, not nice but luckily they don't change often

If enabled, terms of service link will be shown in sign up page.

Fix path ignores in .gitignore to not ignore files inside the paths, but to ignore the path itself. Otherwise git clean -fd is scary as it says its removing them even if not

* 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

* Move all Diaspora-specific javascripts to app/assets/javascripts
* Move all vendored javascripts to vendor/assets/javascripts
* Add the appropriate Sprockets require directives to make sure
  everything gets included in the right order
* Remove Jammit dependencies
* Fix all templates that were using Jammit's include_javascripts helper
* Add handlebars_assets gem for compiling Handlebars templates
* Move all Handlebars templates to app/assets/templates and rename
  from .handlebars to .jst.hbs (this is to keep them in the same
  global JST namespace that they were in under Jammit)
* Add public/assets to .gitignore since these files can and should
  be re-generated by Heroku or Capistrano during each deploy
* Fix a few Handlebars templates that were looking for images in the
  wrong location (I'm sure there are others, but it's late)
* Configure application.rb to precompile all javascript and css assets
  that were compiled by Jammit in the Rails 3.0 code

MS DC; oauth keys are now pulled out of application.yml to be simplier.  incldue newrelic as heroku expects it, without affecting people who do not use newrelic. If you do use new relic in production, you have to put your newrelic api key in application.yml