First alpha version

Features

• Create bar chart directive.
• Create pie chart directive.
• Create one axis chart directive.
• Auto update bars from data changes in bar chart.
• Auto update arcs from data changes in pie chart.
• Build
  • Grunt configuration.
  • Travis integration.
  • Update version in bower file.
  • Add changelog file.

Bug fixes

• Fix error in size for bars in bar chart.
• Fix error in auto-update data in charts.