Merge with Develop :shipit:
Fix template title
Create CONTRIBUTING.md
Merge with Develop
Merge pull request #1 from joseramonc/patch-1

Create CONTRIBUTING.md
Disable 'RUta Carpetea' required field of Plan Model
Merge with Graficas
Resolves Issue #3 'Change Materiales to Descripcion Materiales'
Resolves Issue #2 'Update Plan does not redirect correctly'
Resolves Issue #4 'Remove Plan Anterior column from Plan index view'