Merge pull request #62 from norzechowicz/readme

Added build status and stable version to README
Register controllers as services
Merge pull request #63 from norzechowicz/controllers

Register controllers as services
Fixed typo in README.md
Fixed CS issues
Merge pull request #64 from norzechowicz/code-style

Fixed CS issues
Update README.md
Moved fixture classes to separated files
Merge pull request #65 from norzechowicz/sensio-insight

Moved fixture classes to separated files
Removed unused use statements
Merge pull request #66 from norzechowicz/sensio-insight

Removed unused use statements
Fixed path to form theme template
Updated configuration.md
Added link to demo app
Added change language of admin panel dropdown
Display language dropdown only when display_language_switch parameters is set to be true
Merge pull request #67 from norzechowicz/change-language

Added change language of admin panel dropdown
Added info about translations to docs