Push required Echo version to 3.0.0
Merge branch 'feature/idea-project'

Provides a full-feature IntelliJ IDEA IDE project with inline
testapplication running using Jetty.
Expanded / Updated the README.txt
Small interactive (clientside) testapp to engineer new the visual rendering properties.
Implementation of some visual properties for (Multi)UploadSelect.
- Background, Insets and Border for all
- Additional width/height/BackgroundImage and Foreground for Multiselect.
Document feature updates in CHANGES.txt.
Merge branch 'feature/styling' into exxcellent