updated readme to document custom classes, 1.2.6
updated readme to document custom classes, 1.2.6

WangRex/CLNDR,kylestetz/CLNDR,MadAnd/CLNDR,MadAnd/CLNDR,AleksandrChukhray/CLNDR,AleksandrChukhray/CLNDR,ykshao/CLNDR,joubertredrat/CLNDR,kapke/CLNDR,ykshao/CLNDR,kylestetz/CLNDR,joubertredrat/CLNDR,masterweb121/CLNDR,masterweb121/CLNDR,Klaudit/CLNDR,kapke/CLNDR,WangRex/CLNDR,Klaudit/CLNDR