Merge pull request #271 from GabrielleV/7.x-1.x-alpha

Fix machine name of node type being displayed on node add page instead of human name.
Add None option for non-required select fields
Add None option for non-required select fields
Merge branch '7.x-1.x-alpha' of https://github.com/GabrielleV/DrupalGap into 7.x-1.x-alpha