More DOIUtil refactoring and documentation
More DOIUtil refactoring and documentation

Siedlerchr/jabref,tschechlovdev/jabref,sauliusg/jabref,zellerdev/jabref,obraliar/jabref,mredaelli/jabref,shitikanth/jabref,zellerdev/jabref,zellerdev/jabref,bartsch-dev/jabref,bartsch-dev/jabref,Mr-DLib/jabref,grimes2/jabref,motokito/jabref,Braunch/jabref,jhshinn/jabref,mredaelli/jabref,tobiasdiez/jabref,obraliar/jabref,Braunch/jabref,motokito/jabref,bartsch-dev/jabref,zellerdev/jabref,grimes2/jabref,obraliar/jabref,oscargus/jabref,sauliusg/jabref,grimes2/jabref,JabRef/jabref,zellerdev/jabref,mairdl/jabref,jhshinn/jabref,Mr-DLib/jabref,bartsch-dev/jabref,JabRef/jabref,tschechlovdev/jabref,ayanai1/jabref,motokito/jabref,Mr-DLib/jabref,tobiasdiez/jabref,tobiasdiez/jabref,tobiasdiez/jabref,mairdl/jabref,oscargus/jabref,JabRef/jabref,grimes2/jabref,shitikanth/jabref,obraliar/jabref,obraliar/jabref,shitikanth/jabref,motokito/jabref,ayanai1/jabref,ayanai1/jabref,Siedlerchr/jabref,sauliusg/jabref,tschechlovdev/jabref,oscargus/jabref,Braunch/jabref,mredaelli/jabref,shitikanth/jabref,oscargus/jabref,sauliusg/jabref,mairdl/jabref,Braunch/jabref,Mr-DLib/jabref,tschechlovdev/jabref,grimes2/jabref,Braunch/jabref,jhshinn/jabref,mredaelli/jabref,ayanai1/jabref,oscargus/jabref,JabRef/jabref,mairdl/jabref,motokito/jabref,Siedlerchr/jabref,tschechlovdev/jabref,mairdl/jabref,mredaelli/jabref,jhshinn/jabref,Siedlerchr/jabref,jhshinn/jabref,ayanai1/jabref,Mr-DLib/jabref,bartsch-dev/jabref,shitikanth/jabref