Update ZeLib.js 1.0-b.7

[Add] distinctValues : get disctinct values in a array
[Add] init functions for graphs
[Add] jQuery method for object clone
[Add] Save all fields in a variable
[Add] Write cookie function
[Add] Read cookie function
[Add] get month text (in french)
[Fix] bug with array
[Update] graphs functions to be more flexibles
[Update] More options in graphs.repart and partial rewrite
[Update] ajax VB is throwing error in alert() (optionnal : set ajax.alert to false to prevent this)