casper: Show casper debug files in the dev server.
casper: Show casper debug files in the dev server.

Example:
    http://localhost:9991/casper/casper-failure1.png

synicalsyntax/zulip,rishig/zulip,dhcrzf/zulip,synicalsyntax/zulip,jackrzhang/zulip,dhcrzf/zulip,zulip/zulip,eeshangarg/zulip,hackerkid/zulip,andersk/zulip,timabbott/zulip,hackerkid/zulip,shubhamdhama/zulip,rishig/zulip,zulip/zulip,jackrzhang/zulip,brainwane/zulip,shubhamdhama/zulip,andersk/zulip,dhcrzf/zulip,eeshangarg/zulip,jackrzhang/zulip,synicalsyntax/zulip,timabbott/zulip,showell/zulip,punchagan/zulip,timabbott/zulip,zulip/zulip,shubhamdhama/zulip,shubhamdhama/zulip,showell/zulip,eeshangarg/zulip,tommyip/zulip,rht/zulip,hackerkid/zulip,rishig/zulip,eeshangarg/zulip,showell/zulip,synicalsyntax/zulip,kou/zulip,punchagan/zulip,kou/zulip,rht/zulip,kou/zulip,rht/zulip,rht/zulip,rishig/zulip,tommyip/zulip,eeshangarg/zulip,zulip/zulip,brainwane/zulip,tommyip/zulip,jackrzhang/zulip,andersk/zulip,rht/zulip,eeshangarg/zulip,dhcrzf/zulip,timabbott/zulip,rishig/zulip,punchagan/zulip,rht/zulip,jackrzhang/zulip,kou/zulip,jackrzhang/zulip,timabbott/zulip,hackerkid/zulip,synicalsyntax/zulip,punchagan/zulip,tommyip/zulip,hackerkid/zulip,shubhamdhama/zulip,rht/zulip,kou/zulip,shubhamdhama/zulip,dhcrzf/zulip,shubhamdhama/zulip,dhcrzf/zulip,brainwane/zulip,synicalsyntax/zulip,showell/zulip,rishig/zulip,showell/zulip,synicalsyntax/zulip,andersk/zulip,punchagan/zulip,brainwane/zulip,tommyip/zulip,showell/zulip,tommyip/zulip,eeshangarg/zulip,andersk/zulip,kou/zulip,punchagan/zulip,hackerkid/zulip,zulip/zulip,brainwane/zulip,brainwane/zulip,punchagan/zulip,timabbott/zulip,andersk/zulip,zulip/zulip,kou/zulip,brainwane/zulip,jackrzhang/zulip,showell/zulip,timabbott/zulip,hackerkid/zulip,andersk/zulip,rishig/zulip,tommyip/zulip,dhcrzf/zulip,zulip/zulip