Update Annotator to 2542d55a (typed-packaging branch)

This update fixes the XPath creation, so that our highlights won't leak into them.
Update Annotator to fe865447 (typed-packaging branch)

After this bugfix, we are now storing the canonical URLs
in the URI field of the created annotations.
Firefox Add-on; far easier than expected
Merge pull request #1245 from hypothesis/firefox-addon

Firefox Add-on; far easier than expected
Move wgxpath to lib/polyfills
Show quotes on highlights in stream

Simple typo fix.
Clean up search styles

Remove CSS which is redundant with visualsearch CSS; remove CSS which
serves no purpose or which is unused; place the search container inside
the inner div of the topbar; and just neaten things up.