Add default keyword to vim highlights, fix #36
Add default keyword to vim highlights, fix #36

The default keyword allows colour schemes to define their own settings
for the signs DbgCurrent and DbgBreakPt.

benjifisher/vdebug,Taluu/vdebug,joonty/vdebug,coffeine-009/vdebug,mispencer/vdebug,mispencer/vdebug,benjifisher/vdebug,joonty/vdebug,jerray/vdebug,AndBicScadMedia/vdebug,sumyfly/vdebug,benjifisher/vdebug,jerray/vdebug,tjwallis/vim,coffeine-009/vdebug,tjwallis/vim,Taluu/vdebug,mispencer/vdebug,tjwallis/vim,paprykarz/vdebug,sumyfly/vdebug,paprykarz/vdebug,tjwallis/vim,Taluu/vdebug,AndBicScadMedia/vdebug,sumyfly/vdebug,coffeine-009/vdebug,AndBicScadMedia/vdebug,tjwallis/vim,paprykarz/vdebug,jerray/vdebug,joonty/vdebug