Added PHP version checking at the beginning (5.0+). Fixes Issue 303.
Added PHP version checking at the beginning (5.0+). Fixes Issue 303.

git-svn-id: b31ceac1d759b3771e0bab247dec50e2f8c5649e@403 8e70de24-3a84-11de-b438-597f59cd7555

BrunoDeBarros/dompdf,IvoPereira/dompdf,VictoriaLa/dompdf,ecomstyle/dompdf,Magoja/dompdf,12hys/dompdf,dompdf/dompdf,itzmukeshy7/dompdf,IvoPereira/dompdf,marijnvdwerf/dompdf,theodorDiaconu/dompdf,dannizhang/dompdf,marijnvdwerf/dompdf,sunkanmi-akintoye/dompdf,lucas-issa/dompdf,lordgnu/dompdf,dompdf/dompdf,eluhr/dompdf,itzmukeshy7/dompdf,bcremer/dompdf,itzmukeshy7/dompdf,rdpascua/dompdf,lucas-issa/dompdf,edge-soft/dompdf,Shnoulle/dompdf,sunkanmi-akintoye/dompdf,sunfun/dompdf,sunfun/dompdf,rdpascua/dompdf,mubassirhayat/dompdf,IvoPereira/dompdf,BrandoCommando/dompdf,BrandoCommando/dompdf,rdpascua/dompdf,theodorDiaconu/dompdf,dannizhang/dompdf,sunkanmi-akintoye/dompdf,marciomrs4/dompdf,Shnoulle/dompdf,scotteh/dompdf,bcremer/dompdf,craigfrancis/dompdf,ecomstyle/dompdf,marciomrs4/dompdf,spanichev/dompdf,Magoja/dompdf,spanichev/dompdf,mubassirhayat/dompdf,nathanntg/dompdf,marijnvdwerf/dompdf,dannizhang/dompdf,marciomrs4/dompdf,BrunoDeBarros/dompdf,chielsen/dompdf,edge-soft/dompdf,Shnoulle/dompdf,eluhr/dompdf,chielsen/dompdf,ecomstyle/dompdf,bcremer/dompdf,lordgnu/dompdf,koenpunt/dompdf,Soullivaneuh/dompdf,VictoriaLa/dompdf,eluhr/dompdf,koenpunt/dompdf,BrandoCommando/dompdf,12hys/dompdf,spanichev/dompdf,craigfrancis/dompdf,VictoriaLa/dompdf,scotteh/dompdf,koenpunt/dompdf,sunfun/dompdf,theodorDiaconu/dompdf,Magoja/dompdf,mubassirhayat/dompdf,craigfrancis/dompdf,nathanntg/dompdf,lucas-issa/dompdf,Soullivaneuh/dompdf,Soullivaneuh/dompdf,chielsen/dompdf