Dynamically call params hash for TrackThing#params
Dynamically call params hash for TrackThing#params

Easier to add params now; just add TRACK_TYPE_params method which
returns the hash you want.

Uses more idiomatic ||= instead of if @params.nil?

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