Improvements after presentation

- Better distribution of the navigation bar
- Now the app accept GeoJson, KML and GPX (before only GeoJson), issue [#62](https://github.com/Arquisoft/viade_es3a/issues/62)
- Alert if someone doesnt have control permission in the app
- Better control of errors if the route file is bad (file with no valid content), issue [#63](https://github.com/Arquisoft/viade_es3a/issues/63)
- Alerts now are more visual and "pretty", issue [#64](https://github.com/Arquisoft/viade_es3a/issues/64)

No files, tests, or entry points are named. Start by reviewing issues #62, #63, and #64 and determine whether this issue requests additional work or only summarizes completed presentation improvements; done requires an explicit, separately verifiable scope for the navigation, format support, permission alert, invalid-route handling, and visual alert items.

Written by the indexing model from the issue text.