feature request: allow label of point element to wrap when it is too long

[cjiang-ibm]

This is what we have now.

This is what we want: wrap label "Cholesterol=NORMAL" in multiple lines or use eclipse

syntax to use:
point x(LEVEL) y(POSITION) label(LABEL) axes(none) style('label-location:left;fill-opacity:1;')

data to see the chart:
ID,LEVEL,POSITION,LABEL,FieldName,ImportanceValue,NodeType
0,A,-7,BP=HIGH,BP,0.2,1
1,A,-6,BP=LOW,BP,0.2,1
2,A,-5,BP=NORMAL,BP,0.2,1
3,A,-4,Cholesterol=HIGH,Cholesterol,0.4,1
4,A,-3,Cholesterol=NORMAL,Cholesterol,0.4,1
5,A,-2,Drug=drugA,Drug,0.1,1
6,A,-1,Drug=drugB,Drug,0.1,1
7,A,0,Drug=drugC,Drug,0.1,1
8,A,1,Drug=drugX,Drug,0.1,1
9,A,2,Drug=drugY,Drug,0.1,1
10,A,3,K,K,0.15,1
11,A,4,Na,Na,0.05,1
12,A,5,Sex=F,Sex,0.13,1
13,A,6,Sex=M,Sex,0.15,1
-1,A,7,Bias,Bias,0,0
14,B,-7,H(1:1),Hidden,1.0,1
15,B,-3.5,H(1:2),Hidden,1.0,1
16,B,0,H(1:3),Hidden,1.0,1
-2,B,3.5,Bias,Hidden,1.0,0
17,C,0,Age,Age,1.0,1