Fix spec runner for browser environment
Fix spec runner for browser environment

Spec runner is a rack app, which now uses the same OPAL_SPEC technique
for specifying which specs to run.

suyesh/opal,kachick/opal,wied03/opal,wied03/opal,Ajedi32/opal,Mogztter/opal,catprintlabs/opal,jgaskins/opal,merongivian/opal,Flikofbluelight747/opal,gausie/opal,gabrielrios/opal,castwide/opal,suyesh/opal,bbatsov/opal,Ajedi32/opal,domgetter/opal,c42engineering/opal,iliabylich/opal,opal/opal,Mogztter/opal,bbatsov/opal,Ajedi32/opal,kachick/opal,wied03/opal,iliabylich/opal,opal/opal,domgetter/opal,kachick/opal,merongivian/opal,gausie/opal,castwide/opal,suyesh/opal,jgaskins/opal,jannishuebl/opal,fazibear/opal,jannishuebl/opal,gabrielrios/opal,bbatsov/opal,iliabylich/opal,opal/opal,opal/opal,gabrielrios/opal,gausie/opal,fazibear/opal,castwide/opal,c42engineering/opal,Mogztter/opal,Flikofbluelight747/opal,Mogztter/opal,c42engineering/opal,jgaskins/opal,jannishuebl/opal,catprintlabs/opal,kachick/opal,Flikofbluelight747/opal,catprintlabs/opal,merongivian/opal,fazibear/opal