minor fix
fine tune compile LESS process
minor fine tune navbar style
Feature ZK-1971: ZK wcs file shall exclude the css with zk logo image
minor fine tune
Update Readme

add reference link
Merge branch 'master' of github.com:zkoss/atlantic
update version to 0.8.1 and use zkless-engine-maven-plugin
fix navbar bug
extract theme color variables
fix various issues for latest ZK 7