Set blog and twitter params to empty string
Set blog and twitter params to empty string

This is the default value from lib/configuration.rb if they aren't set
and null values cause errors when .empty? is called on them.

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