fix(styling): change css base class from ww-select to w11k-select
feat(dependencies): eliminate dependency to jQuery
perf(rendering): render option list lazy (on first open of dropdown)
perf(rendering): use 'track by $index' to improve rendering speed of option list
fix(buttons): fix clear button, separate code for deselectAll and deselectFiltered
chore(directive): simplify isEmpty()
doc(demo): add some data to demo
chore(project): bump version to 0.2.0
docs(changelog): update changelog for 0.2.0
Merge branch 'release/0.2.0' into develop
chore(project): bump version to 0.3.0-SNAPSHOT