Flowcharting 0.4.0

[algenty]

Hi grafana team,

After 4 months of work, i think this version is ready to publish

BR,
Arnaud

[0.4.0 SNAPSHOT] - 2019-09-14

Added

• Draw.io editor (Example)
  • Open draw.io with dark theme for better rendering
  • Display waiting screen when loading xml definition.
• Upgrading libraries
  • mxGraph 4.0.4
  • draw.io 11.2.8
• Graph definition
  • Adding download function to download source by http on load. (See example)
• Metric
  • Adding string support for state (See example)
• Zoom (issue #19) (See example)
  • On the mouse pointer : Ctrl + Mouse
  • Hold right button to move diagram.
  • double click on shape to zoom on.
  • Escape key to restore.
• Tooltip/popup support (Example)
  • Grafana style css and date
  • Adding metrics with color according levels
  • Adding colors on metrics in tooltip
  • Adding date of change
  • Adding label input for metric
• Variables/templates support, accept variable like ${} (See example)
  • In xml definition
  • In text mapping when type in sring for "Range to text" and "Value to text"
  • In link ovewrite
• full shapes from draw.io included (See example)
• Some optimizations

Fixed

• Optimization when refresh/render (issue #15)
• No decimal fixed when 0 (issue #23)
• Text substring and color (issues #29)