Add gulpfile.ls and package.json and compile to _public folder.  issue #11

Signed-off-by: Lee <jessy1092@gmail.com>
Merge branch 'master' into develop
project-list.ls instead of projectlist_20141009.json.ls
Add Gulp README.md issue #11

Signed-off-by: Lee <jessy1092@gmail.com>
Merge pull request #18 from g0v/develop

Use gulp to build. close #11