added exception catching in the front controller
added exception catching in the front controller

and besides 404's, now 403's and 500's are also caught, if a route
exists

himaratsu/appbot,vano00/jobs,fjcarreterox/agdata-management,notfoundsam/yahooauc,atarun/web,notfoundsam/yahooauc,ice-inc/sakana,notfoundsam/yahooauc,atarun/web,niinoeiichi/de,fjcarreterox/agdata-management,uzura8/flockbird,y-ohgi/fuel_unity,Darragh-McCarthy/basic-ajax-login,uzura8/fuel_sample,Darragh-McCarthy/angular-ajax-login,kenjis/fuelphp1st-2nd-contact-form,fuel/fuel,atarun/web,vano00/blog,wata727/fuel-simplesamlphp-example,Darragh-McCarthy/basic-ajax-login,qipa/fuel,atarun/web,Darragh-McCarthy/angular-ajax-login,actcat/sideci_php_sandbox2,arushishi/gmenu,yamadatarousan/game,vano00/jobs,atarun/web,uzura8/flockbird,thuraucsy/fuel,kiro112/deck_cards,notfoundsam/yahooauc,atarun/web,niinoeiichi/de,uzura8/flockbird,atarun/web,atarun/web,taishikato/Practice-Fuel-PHP,atarun/web,vano00/blog,yamadatarousan/game,uzura8/flockbird,arushishi/gmenu,atarun/web