Flip edit icon in RTL

Change-Id: Icc47adeda16b5f19a0e71afe86da942ccd1d7688
Localisation updates from https://translatewiki.net.

Change-Id: I91042b887af38e613a298c60d4b0241e7a55ceae
Merge "Flip edit icon in RTL"
Variety of small UX/Design tweaks.

Search field's clear "x" button larger.

Search field reverts to "Search Wikipedia" after
5 seconds, but when you tap on search field again
it remembers your last search term.

Lightened search field's "Search Wikipedia" text
color.

Change-Id: I97491fd962ed8637253440b5fc47afc9c31ebc08
Merge "Variety of small UX/Design tweaks."
Article history interface.

Main menu entry for loading list of last 50 changes made
to currently displayed article. Will need to add "continue"
and proper icon in near future.

This is the first use the iOS app has made of the new
WikiFont.ttf!

Change-Id: Ia247e1c872ead7225b7ca7c2255e6036dbc23d21
First pass at credits page.

Temporary menu entry and icon at bottom of main menu.
Tapping on items loads respective urls in Safari.

Change-Id: I0960284c1186630d6db75c50234d1088148e1aba