Add hixie-76 websocket support; turn on additional phantomjs tests.

Add support for (old, obsolete) hixie-76 websockets, which not
coincidentally happen to be the version of the websocket standard
supported by phantomjs 1.x.

This allows us to turn on the functional tests in the doctestjs suite.
Fixing IE 11 background-color: inherit issue

Fixing #1017
do not update form focus when urls differ
The `fallbackLang` configuration parameter contains an underscore.

Our internal language names should always use dashes instead, in
accordance with BCP 47.

Fixes: 1013
Create es-BO.

Also fix the availableTranslations lookup/fallback logic to be more
accomodating of optional country suffixes.

Fixes: #1010
Replace old towtruck slogan