Don't scale single-char text divs.

This change makes scrolling noticeably smoother on files with many
single-char text divs, such as the one in #1045. The trade-off is that
the visual appearance of text selection in such documents is slightly
worse, because more text divs overlap.

This change also uses `scaleX(N)` instead of `scale(N, 1)`. This might
be marginally more efficient in terms of JS string concatenation.
Fix Zoom box resizing when it's hidden when the viewer loads (issue 5224)
Auto zoom landscape documents to fit their height
Replace magic scale value 0 with UNKNOWN_SCALE
Workaround for TrueType fonts with exotic cmap tables (bug 1057544)
Remove a duplicate PDF file from the test suite

The files issue3115.pdf and issue2337.pdf are identical, the only difference being that the first one is an `eq` test and the second one a `load` test. Hence there is no reason to keep the `load` test, since it's just a subset of the `eq` test.
Update link-to-wiki generator
Remove TextDecoder feature tests

TextDecoder is not required by PDF.js any more, and the wiki entry has been deleted as well:
https://github.com/mozilla/pdf.js/wiki/Required-Browser-Features/_compare/13ddaa98459236169c1d7969f00fa5610bf7e10f...09aac34e58549698930735bdd10685b9ee54a9ac
Add getStats unit test

Since some Telemetry data depends on `getStats`, having a unit test should make it more diffucult to accidentally break this without noticing.
Further amend GlyphMapForStandardFonts (issue 5244)
Add more cases to |mapSpecialUnicodeValues| to fix the rendering of various Symbol encoded brackets
Add |SpecialPUASymbols| map and refactor |mapSpecialUnicodeValues|
Merge pull request #5260 from Snuffleupagus/symbol-brackets

Add more cases to |mapSpecialUnicodeValues| to fix the rendering of various Symbol encoded brackets
Version 1.0.712
Merge pull request #5267 from yurydelendik/version1.0.712

Version 1.0.712
Update l10n
Merge pull request #5226 from Snuffleupagus/issue-5224

Fix Zoom box resizing when it's hidden when the viewer loads (issue 5224)
Merge pull request #5248 from Snuffleupagus/getStats-unit-test

Add getStats unit test
Firefox pdf viewer support for e10s (Bug 942707).
Adjust use of chrome.storage.managed for Opera

It turns out that chrome.storage.managed is defined for Opera, so the
previous feature detection method did not work.