Merge pull request #100 from khoa-nd/master

Please pull the latest code
Refactor bubble chart & pie chart
Merge commit '640883ea581497a9dee2cb2b9bae1ffeddb21965'
Switch to mobile
Shortcut now support default esc is goback to history
Added some javadoc.
Refactored some method names.
Removed unused class LookUpUtils.java
Removed the whole landingpage
Add a new field into JSON model for search
Merge commit '35f30e3a2bd8e070c93f04f06ae37cdc724dd88f'
update register page and style responsive for bubble chart new version
Merge branch 'r-bubble-chart' of https://github.com/johnsonpham/TechLooper into r-bubble-chart
Merge commit 'a9dae1a8c4cd3b5843f80e1ce3c704c49bffcd28'
Remove *.v2 files