Dockerizing

Initial celery integration.

Use an SLD's name instead of text from a name element when saving styles.

Rename GeoGit to GeoGig.

Use a single paver task to execute all of the tests.

Use client-side polling (instead of server-side) when using the importer upload.

fixed the pluralization of translated strings

Update Readme to reflect docker and fig usage

this is needed for docker to make sure the docker container is not
stopped because no active process is detected

Correcting a few translations for portuguese

Added an AMI from the us-east1 data center.

Fix #1843

* When a geoserver administrator creates a new Cascading WMS (in Geoserver 2.5), the `advertised` element is not exposed in the rest endpoint until the user toggles the advertised boolean resulting in an AttributeError when the --skip-unadvertised switch is present.