Added 8 new example under "Logical Patterns".
Added 8 new example under "Logical Patterns".

nadundesilva/siddhi,tishan89/siddhi,miyurud/siddhi,dilini-muthumala/siddhi,ksdperera/siddhi,grainier/siddhi,gokul/siddhi,minudika/siddhi,sajithshn/siddhi,ramindu90/siddhi,wso2/siddhi,minudika/siddhi,ChariniNana/siddhi,ksdperera/siddhi,miyurud/siddhi,ramindu90/siddhi,slgobinath/siddhi,suhothayan/siddhi,codemogroup/siddhi,nadundesilva/siddhi,ChariniNana/siddhi,sajithshn/siddhi,suhothayan/siddhi,slgobinath/siddhi,dilini-muthumala/siddhi,mohanvive/siddhi,wso2/siddhi,tishan89/siddhi,gokul/siddhi,grainier/siddhi,codemogroup/siddhi,mohanvive/siddhi