add function

i changed sum method edit and add.
1. can multi series 
( Max line 3)

2. can select popup mode. ( (1) Max , Min  (2) ALL (3) None)
lineView.setPOPUP_TYPE(lineView.MAXMIN_ONLY);
lineView.setPOPUP_TYPE(lineView.ALL);
lineView.setPOPUP_TYPE(lineView.NONE);

3. can select BackgroundLine
lineView.setDOTLINE(false);