add algorithm to generate the calendar's text color
add algorithm to generate the calendar's text color

endsguy/server,cernbox/core,sharidas/core,cernbox/core,pollopolea/core,owncloud/core,jbicha/server,nextcloud/server,Ardinis/server,pixelipo/server,lrytz/core,xx621998xx/server,pmattern/server,pixelipo/server,xx621998xx/server,IljaN/core,whitekiba/server,michaelletzgus/nextcloud-server,michaelletzgus/nextcloud-server,cernbox/core,endsguy/server,sharidas/core,Ardinis/server,bluelml/core,pmattern/server,xx621998xx/server,endsguy/server,michaelletzgus/nextcloud-server,endsguy/server,Ardinis/server,endsguy/server,michaelletzgus/nextcloud-server,andreas-p/nextcloud-server,andreas-p/nextcloud-server,lrytz/core,andreas-p/nextcloud-server,owncloud/core,bluelml/core,pollopolea/core,pixelipo/server,pixelipo/server,jbicha/server,pmattern/server,sharidas/core,pollopolea/core,whitekiba/server,lrytz/core,whitekiba/server,IljaN/core,IljaN/core,bluelml/core,Ardinis/server,pixelipo/server,andreas-p/nextcloud-server,IljaN/core,nextcloud/server,owncloud/core,sharidas/core,sharidas/core,xx621998xx/server,owncloud/core,IljaN/core,pmattern/server,bluelml/core,lrytz/core,nextcloud/server,jbicha/server,pollopolea/core,jbicha/server,lrytz/core,phil-davis/core,cernbox/core,pollopolea/core,jbicha/server,bluelml/core,andreas-p/nextcloud-server,owncloud/core,pmattern/server,nextcloud/server,whitekiba/server,whitekiba/server,cernbox/core,Ardinis/server,xx621998xx/server