fix(timeline): #2679 TypeError: Cannot read property 'hasOwnProperty' of null (#2735)
fix(timeline): #2679 TypeError: Cannot read property 'hasOwnProperty' of null (#2735)

* Fix redraw order
* Fix error when option is not defined
* Allow template labels
* Add .travis.yml file
* Add experiment travis code
* Fix react example
* Fix bug in item editable
marcortw/vis,yotamberk/vis,marcortw/vis,yotamberk/vis