Update ZeLib.js to 1.2.20130828

- [Rewrite] [Graphs] Rewrite plot function to become more flexible
- [Add] [Graphs] Custom axis title support for plot
- [Add] [Statistics] Error function (Gauss Error Function) Calc
- [Add] [Statistics] Inverse Error function (Inverse Gauss Error Function) Calc
- [Add] [Statistics] Confidence interval
- [Add] [Statistics] Draw confidence interval on qq-plot
- [Add] [Graph] Add series on plot graph
- [Add] [Math] sign function
- [Fix] [Graphs] Some default strings for plotting where at wrong place
- [Remove] jslint options