Update diaspora.yml.example

Fixed the wording so admins know invites are either enabled or disabled, and the number of invites is set by default to 25.
Merge pull request #4070 from workwareusa/patch-1

Update diaspora.yml.example
bump addressable
bump excon
bump sass
bump client_side_validations
bump coderay
bump guard
bump handlebars_assets
bump unicorn
bump safe_yaml
bump font-awesome-sass-rails
bump rspec-rails
bump faraday
bump foreigner
bump childprocess
bump selenium-webdriver
bump cucumber-rails
bump redis
bump fog