rgonzalezp/Markit: Markit V1.1

First version, fully working.

Features available:

• Importing models from the model site (need to be connected to internet). This is done through the id given in the models site.
• Export the model to a .json file.
• Import models offline through a .json file
• Deleting "areas" labeled, this means if you select 1 face and delete its label, it should delete the complete area with the same label. It should be easier to edit the model
• Edit on top of a completed model (This means a model with labels and a scaffold)
• Add the tracker scaffold model and merge with your model (This process should be done by the "merge object with tracker scaffold" button, align the scaffold in its final position, select the model and then click on the merge button)