Update landfill urls
Add --site option to install_landfill
Merge branch 'master' of https://github.com/mozilla/zamboni into update-landfill-urls

Conflicts:
	apps/amo/management/commands/install_landfill.py
Revert "Add --site option to install_landfill"

This reverts commit 232250ceba5a751408f4b5888103791779a033d4.
Remove references to addons landfill URL
Merge branch 'update-landfill-urls'
Commit from Mozilla Verbatim by user cesperanc@.: 2491 of 2491 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user cesperanc@.: 2491 of 2491 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user cesperanc@.: 2491 of 2491 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user ibai@oihanguren.com.: 1329 of 2491 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user cesperanc@.: 2491 of 2491 strings translated (0 fuzzy).
Send sub-tasks to celery properly, even post_request_tasks (bug 1021158)

post_request_task before this patch only send tasks to celery inside
the request-response cycle, preventing indexation from being triggered
from inside a task (outside the request-response cycle).
Move apps/translations/ to mkt/translations/ (bug 1021204)
Merge pull request #2212 from diox/mv-translations

Move apps/translations/ to mkt/translations/ (bug 1021204)
Merge pull request #2211 from diox/tasks-inception

Send sub-tasks to celery properly, even post_request_tasks (bug 1021158)
some pep8 cleaning
remove references to global header/footer submodules (bug 1025263)
Commit from Mozilla Verbatim by user ibai@oihanguren.com.: 1379 of 2491 strings translated (0 fuzzy).
Merge branch 'master' of ssh://github.com/mozilla/zamboni
Commit from Mozilla Verbatim by user ibai@oihanguren.com.: 1380 of 2491 strings translated (0 fuzzy).