fix ssoup dependency
fix fruitless case
remove scalatest and scalacheck
remove TestUtils
add CheckboxTreeView
Add CheckboxTreeView
add recursive check
add new unit tests for CheckboxTreeView
fix parser test
fix CheckboxTree
add partial download callback
Add option graphic for tree item
add download list view
add year choice
add videolessons.html test file
add videocourses page
add videocourse parser test
add videocourse list
add video downloads
bump to version 0.2.0