Code refactoring
 - remove duplicate code
remove unidentified code
bugfix - cookie exists but contents doesn't
add DynaTree library
add DynaTree Combine test page
change return commit date format
refactoring code navigation logic
change some code navigation style
move chrome scroll-bar style
remove useless codes
change remote moment.js file to local
change remote file to local
remove unused string
Merge remote-tracking branch 'origin/master'