Added updated doc for Postgres export by Fred Stevens
Added updated doc for Postgres export by Fred Stevens

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