v0.5.0

• Show task runtimes (sorted by their relative start time) and color by duration (red- longest, green- shortest). (closes #2, closes #3, closes #25)
• Move 'show workflow definition' to right panel (to be consistent with showing task definition).
• MistralService.workflowDef() will return an WorkflowDef.FromEmpty() instance instead of throwing exception.
• Workaround: Cache requests to get workflow definition.
• Redesign landing page
• Move 'sort' styles to a dedicated file
• Search pipe: Simplify class and allow passing field names for filtering
• Since Mistral exposes times in seconds granularity, there could be a duration of 0 seconds, which is misleading. This commit shows "< 1 second" in the UI for such cases.
• nginx configuration: Make default listener non-ssl (thanks @andrask )

BREAKING CHANGE:

• remove old fonts from build (eot, ttf, svg) and only keep woff and woff2 (supported by all major browsers).