Fix ToC scrolling to sections near end of page

The ToC section tap code was scrolling past the end of the document,
which got reset as soon as we adjusted the document further (say by
zooming in when hiding the ToC).

Work around this by saving the scroll position before we zoom out,
and setting it back again after the animation. There is a brief
flash in the case where we had to move, but it works on iOS 6 and 7
and has less scary bridge code than previous patch attempt. :D

Bug: 67633
Change-Id: Idc6f454bc35fd621b3434734a0629ad750d441d0
License string corrected

Correct license abreviation is CC BY-SA 3.0.
(per https://creativecommons.org/licenses/by-sa/3.0/)
Affects:
* license-footer-name

Spotted by Jopparn at https://translatewiki.net/wiki/Thread:Support/About_Wikimedia:Wikipedia-ios-license-footer-name/sv

Change-Id: Icaa1afa24e53d75af195ed332b14111f4e40e19b
Animate splash logo.

Change-Id: I3d25c17b3f86f0821d669b894f08b4796618bbda
Merge "Animate splash logo."