Use more semantic allow_blank validation
Use more semantic allow_blank validation

petterreinholdtsen/alaveteli,andreicristianpetcu/alaveteli_old,TEDICpy/QueremoSaber,4bic/alaveteli,Br3nda/alaveteli,andreicristianpetcu/alaveteli,4bic/alaveteli,nzherald/alaveteli,datauy/alaveteli,andreicristianpetcu/alaveteli_old,petterreinholdtsen/alaveteli,nzherald/alaveteli,codeforcroatia/alaveteli,4bic/alaveteli,andreicristianpetcu/alaveteli,petterreinholdtsen/alaveteli,nzherald/alaveteli,codeforcroatia/alaveteli,petterreinholdtsen/alaveteli,4bic/alaveteli,nzherald/alaveteli,datauy/alaveteli,datauy/alaveteli,Br3nda/alaveteli,andreicristianpetcu/alaveteli_old,codeforcroatia/alaveteli,andreicristianpetcu/alaveteli,andreicristianpetcu/alaveteli_old,petterreinholdtsen/alaveteli,codeforcroatia/alaveteli,Br3nda/alaveteli,Br3nda/alaveteli,TEDICpy/QueremoSaber,andreicristianpetcu/alaveteli,TEDICpy/QueremoSaber,andreicristianpetcu/alaveteli_old,TEDICpy/QueremoSaber,andreicristianpetcu/alaveteli,4bic/alaveteli,Br3nda/alaveteli,nzherald/alaveteli,TEDICpy/QueremoSaber