Re-add jQuery output to the assets.yaml

Otherwise the Chrome extension doesn't get the jQuery file copied
into it's public folder.
Merge pull request #1703 from hypothesis/add-jquery-asset

Re-add jQuery output to the assets.yaml
Revert "Merge pull request #1703 from hypothesis/add-jquery-asset"

This reverts commit 5e665b07b99a43577c581a3e11b84feaabdd69d2, reversing
changes made to 5eec60a4a60f3883c9fcd0d32d21e33c7dcdcecf.

Fixes #1705.
Shut up, Pylint.
Remove URL path from the Chrome CSP in development

For some reason this fails to inject scripts in Chrome (38.0.2125.122)
due to CSP violation even though the two paths appear to match. Removing
the path from the host/port seems to fix the issue.