Improve de locale

- TrimChats was called before a newly maximized chat had its final width which
  prevented it from working as intended.
- We cannot check for available space by using the width of the #conversejs
  element anymore, since it now has variable (auto) width. So we check against
  the body width instead.

Merge branch 'icomoon-xa-icon' of https://github.com/thierrytiti/converse.js into thierrytiti-icomoon-xa-icon

Merge branch 'MUC-toggle-Call' of https://github.com/thierrytiti/converse.js into thierrytiti-MUC-toggle-Call

fonts built with icomoon

https://github.com/jcbrand/converse.js/commit/47e00ae005fc4034836595d4267953b46a869cb7

- HAS_CSI might be called before features have been received. Instead, set a
  flag whenever a feature is received and check for that flag.
- Converse.ping was sending stanzas to the bare jid instead of to the domain.
- The handler that updates the date the last stanza was received must return
  true so that it gets called again.
- Only register the Pong handler if Ping is enabled.
- Rename lastMessage to lastStanzaDate to make it more clear.

Also use and add a Strophe namespace for CSI.

Conflicts:
	converse.js

XEP-0199: XMPP Ping

Use modified StropheJS ping plugin (AMD support)
Add Ping functionality
Add Pong handler

Fix to issue #144:

Offline Pretty Status

add offline as possible case to enable translation

the Call button is visible but no action is done

CSS: Fonts Path: editable $font-path via sass/variables.scss

Add a variable to build CSS with another path for the fonts
import added in  ``sass/converse.scss`` : Undefined variable $font-path
with ``make css``

Call to registerRosterXHandler and registerPresenceHandler on onReconnected give exception.

Change html files so that we auto-detect the lang now.

Merge branch 'detect_lang' of https://github.com/thierrytiti/converse.js into thierrytiti-detect_lang

Css fixes

main div conversejs
- left and width: The last 35px at bottom of the page is not clickable
- right: in some case (e.g. frame in div), the div is over the vertical
scrollbar

room-info:
- wrong placement on hover after information fetched on a room

XEP-0352 support added to Auto Away Mode

These files can still be built by running `make build`. However we remove them
from version control because they bloat the repo, especially diffs of minified
files, which are large.