Display Horizon version number in System Info page

This patch adds the Horizon version number at the bottom of System
Info page.

Change-Id: I81514d1c99a32cd8161a65535638c235c2cfc317
Closes-Bug: #1261431
Delete debug statement in js file

In file horizon/static/horizon/js/horizon.tabs.js and file
horizon/static/horizon/js/horizon.heattop.js there are some
useless debug statement(console.log(xxx)).

Change-Id: Ie9a7c0e69410a6028298a485d170272551f0c506
Imported Translations from Transifex

Change-Id: Idb58dbfd1c77c691debfc64feb625357b1d98917
Merge "Display Horizon version number in System Info page"
Merge "Delete debug statement in js file"
Merge "Imported Translations from Transifex"