Update README.md

- added description of abbreviation
#2 Login
- added support for doctrine 2 console
- added boostrap and jquery
- created login page
- added SecurityService, SessionService, UrlGeneratorService, RememberMeService
- created sqlite database with default user Admin and role ROLE_ADMIN
#1 Base Design
- replaced bootsrap with a bootstrap paper layout
- added navbar
- added default grid view for overview page
Merge pull request #8 from developerrespig/YAFF-1

#1 Base Design
#2 Login
- refactored login page
- added logout to navbar
#2 Login
- added CRUD functionality for users
- added CSRFService
- added ajax-loader image
#2 Login, fixed wrong folder name for case sensitive systems
#4 i18n
- added TranslationService
- set de as default locale
- added translations for all existing pages
Merge pull request #10 from developerrespig/YAFF-4

#4 i18n
Merge pull request #9 from developerrespig/YAFF-2

#2
Merge branch 'master' into YAFF-6

Conflicts:
	config/Routing.php
	config/ServiceProvider.php
	src/YAFF/Overview/Views/index.html.twig