* show drop effect on folders only
- fix `hasValue` api for data rows (avoid 'false' value to be evaluated as missing value)
- support for evaluating drop support for rows
- document list enables upload zones for folders only
* api improvements as per code review
* Create a new component Task Attachment List
Improve the datatable to get the rows to show
* The component name should follow the guide style
Move the Content calls in a different service file
Show the attach file inside the viewer
* Change method name
* Datatable should get the path and show the icon
* Improve attachment component
* Improve datatable documentation
* Remove console.log
* support for column definitions in html
- provides generic support for html-based column definitions for
datatable-like controls
* html column definitions for Task List component
* html column definitions for Document List component
* update code and documentation
* showing selected row
Support for showing selected row for the components:
- DataTable
- DocumentList
- Activiti TaskList
- Activiti ProcessList
fixes#170
* unit test fixes