Refactor TrackType types and mediums to constants
Refactor TrackType types and mediums to constants

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