adding fix for first line missing problem

Changes
* added second parameter to google.visualization.arrayToDataTable call

This function takes 2 parameters, the second is a boolean to specify if
the first entry in the data array contains header information.

ref:
https://developers.google.com/chart/interactive/docs/reference#google.visualization.arraytodatatable
Merge pull request #21 from elmiko/gh-pages

adding fix for first line missing problem