v1.4.1 - migration to react

We have continued migrating the app to the React framework. Things are going well and we have managed to create the landing page and all the interactions between Datasets, Pipeline, and Experiments.
On the Experiments details page, we have managed to create the list of charts for all experiments and the details charts below it and all the interactions between these (selection, zoom, event display). We also included unit tests and updates based on feedback. Things like Reset brush when selecting new Datarun #166 .

We still have to work on adding new events, adding comments and the radial charts in the right-hand side of the page. These will be added in the next release.