skip build doc module
fix home page learn portlet error
fix initialize database and template
Update .travis.yml
add rest implement example, config test
Merge branch 'master' of github.com:phamtuanchip/estudy
try to change Collection to arraylist
Update README.md
add rest api for category
add more rest service example
add some new ui layput
add thumbnail rest service and ui resource viewer
update ui
add flowplayer
add media viewer