Update pootle_js.po

Quick fix for bug #2857
Remove changelog section for hooks API

This change was backed out in the final commit but I missed this doc.
Docs typos

"in tact" -> "intact"
"seperate" -> "separate"
"issueing" -> "issuing"
Increase pip install connection timeout even more

Python 2.5 urllib2/httplib has limited support for timeout, unclear if
that is part of the reason we're still seeing these errors
Update translations

* Pull from Pootle server
* Enabled ar and uk by default
White-space nits.
Removed a bunch of unused imports.
Ooops, class name is PootleJSONEncoder.
Fixed TemplateSyntaxError call.
Fix collectstatic for Django 1.4

Fixes bug 2752
Simplified unit filtering conditions.
Treat 'all' filter explicitly.
Set drop-down selected values using select2's API.

If we only manipulated the DOM, the selected state wouldn't be reflected
in the select2 widget.
Moved decorators shared across apps to pootle.core.decorators.
Use explicit relative imports.
Moved decorators to its own module.
Organized imports.
Remove quality checks' drop-down when performing searches.
Require `filter=checks` when filtering checks.

Although this doesn't apparently add anything exciting, it'll help to keep
the editor's filtering query strings aligned across different types of
pages.
Fixed background styling issue.