Group Member Setter

[Chris Pike]

The Group class has two setters

    public void setMembers( List<String> members )
    public void setMembers( String members )

this causes issues since some frameworks don't know what the correct setter is 
for members. Unless someone objects, I am going to change

public void setMembers( String members )

to 

public void setMembersWithCsv( String members )