stop calling contains (Box is the only caller).  Also, call ensureCapacity when adding lots of molecules instead of growing the list a little bit at a time
stop calling contains (Box is the only caller).  Also, call ensureCapacity when adding lots of molecules instead of growing the list a little bit at a time

ajschult/etomica,etomica/etomica,etomica/etomica,etomica/etomica,ajschult/etomica,ajschult/etomica