Merge pull request #137 from YanshuoH/form-debug

fix the bug of class/sub-class when editing a ticket, #131, tried #108.
Merge pull request #138 from YanshuoH/local-lib

update js and css libraries to be local for offline demo, #136
Merge pull request #139 from YanshuoH/import-dataset

update logic in excel parser plugin, update import excel structure.
Merge pull request #140 from YanshuoH/ticket-view

update ticket view, #130
Merge pull request #143 from YanshuoH/ticket-list-duplicate-bug

quick fix #142