redirect / to /pl; close #528
redirect / to /pl; close #528

tbretl/PrairieLearn,kevinwang/PrairieLearn,kevinwang/PrairieLearn,mwest1066/PrairieLearn,kevinwang/PrairieLearn,tbretl/PrairieLearn,PrairieLearn/PrairieLearnHack,PrairieLearn/PrairieLearnHack,jakebailey/PrairieLearn,mwest1066/PrairieLearn,PrairieLearn/PrairieLearnHack,PrairieLearn/PrairieLearnHack,tbretl/PrairieLearn,mwest1066/PrairieLearn,rbessick5/PrairieLearn,lotrfan/PrairieLearn,lotrfan/PrairieLearn,rbessick5/PrairieLearn,PrairieLearn/PrairieLearnHack,PrairieLearn/PrairieLearnHack,parasgithub/PrairieLearn,kevinwang/PrairieLearn,lotrfan/PrairieLearn,tbretl/PrairieLearn,lotrfan/PrairieLearn,parasgithub/PrairieLearn,kevinwang/PrairieLearn,jakebailey/PrairieLearn,kevinwang/PrairieLearn,mwest1066/PrairieLearn,parasgithub/PrairieLearn,rbessick5/PrairieLearn,PrairieLearn/PrairieLearnHack,rbessick5/PrairieLearn,rbessick5/PrairieLearn,mwest1066/PrairieLearn,lotrfan/PrairieLearn,jakebailey/PrairieLearn,kevinwang/PrairieLearn,lotrfan/PrairieLearn,parasgithub/PrairieLearn,lotrfan/PrairieLearn,tbretl/PrairieLearn,jakebailey/PrairieLearn,PrairieLearn/PrairieLearnHack,parasgithub/PrairieLearn