Readme: add PlainTextHandler
Readme: add PlainTextHandler
emilkje/whoops,filp/whoops,Vmak11/whoops,UnderDogg/whoops,Vmak11/whoops,nonconforme/whoops,michabbb-backup/whoops,nonconforme/whoops,emilkje/whoops,stefen/whoops,oligriffiths/whoops,staabm/whoops,staabm/whoops,stefen/whoops,oligriffiths/whoops,michabbb-backup/whoops,UnderDogg/whoops,filp/whoops