* Skip 28 bandit warnings (lxml, subprocess, ...).
Still have 4 warnings which worth to fix.

* Fixed unit tests
* Added copyright

* Create travis.yml
* Create docker-compose-ci.yml
* Update README.md
* Update CONTRIBUTORS.md

* Fix propagate behaviour: propagate always on all frames
* Image-relative coordinates are used for propagate
* Eslint fixes

fixed shapeCollection.import() for old tasks. Now data is imported properly if server returns client_id = -1 for all shapes (#228)

Adding the Questions section and inserting an entry to this section in the Documentation part, so users having a quick view will be aware of it.

* removed shape id info from dump
* force set client id by server in save annotation for task functionality
* delete unused code

* Fix #123 (Uploading large XML Files)
* Integrated SILK for profiling.
* Don't try to call save_job without objects.

* Fixed: single point wasn't created in right scenario, double press N (without any point) created a point
* Fixed: merge didn't create outside objects in some cases
* Fixed: split didn't work right
* Object selection propagated to next frame

* Fixed: both context menu are opened simultaneously
* Fixed: shape can be unavailable behind text
* Fixed: invisible text outside frame