Update installation process in README.md depends on Symfony 2.1
Update installation process in README.md depends on Symfony 2.1

bolotyuh/fwdays,stfalcon/fwdays,stfalcon/fwdays,stfalcon/fwdays,bolotyuh/fwdays,stfalcon/fwdays,bolotyuh/fwdays,bolotyuh/fwdays,bolotyuh/fwdays