Disable Google Translate on viewer in Chrome.

test/pdfs/yo01.pdf triggered "This page is in Japanese. Would you like
to translate it?" info bar in Chrome.
Use dummy font for testing when pdf fonts are loaded.
[CRX] Improved navigation detection.

A user reported that the PDF Viewer is not rendered on Dropbox,
(Chrome on Mac OS X). This is apparently caused by the fact that the
PDF file is loaded in an iframe in such a way that the tabs.onUpdated
event is not triggered.

This patch switches to the webNavigation event API, which improves the
reliability of the navigation detection.

Unfortunately Opera 15 does not support the webNavigation API, so the
old (tabs.onUpdated) method is used (feature-detection is used, so
whenever Opera decides to implement this API, it will profit from it).
Add atob polyfill. Remove uneeded data uri polyfill.
[CRX] Delay render of viewer if needed...

Sometimes, the viewer did not render for PDF files in an iframe,
because document.readyState not reaching "complete".

Deferring window.stop() until the root element is placed in the
document fixes the problem (typically a few ten milliseconds).
Merge pull request #3476 from Rob--W/no-google-translate

Disable Google Translate on viewer in Chrome.
Merge pull request #3484 from Rob--W/crx-improved-navigation-detection

[Chrome extension] Improved navigation detection by using webNavigation instead of tabs API.
Merge pull request #3477 from brendandahl/font-loading

Use dummy font for testing when pdf fonts are loaded.
Moves changeable details from etherpad and README to issues and wiki pages
Presentation mode shortcut implementation
Merge pull request #3422 from timvandermeij/presentation-mode-shortcuts

Presentation mode shortcut implementation
Move PDFHistory from viewer.js to its own file
Merge pull request #3489 from Snuffleupagus/move-PDFHistory

Move PDFHistory from viewer.js to its own file
Fix the positioning of the progressive loadingBar
Merge pull request #3332 from Snuffleupagus/fix-loadingBar

Fix the positioning of the progressive loadingBar
Fixes regression that cause scrolling using spacebar to break in Firefox
Merge pull request #3497 from Snuffleupagus/regression-3447

Fixes regression that cause scrolling using spacebar to break in Firefox
Check if viewer is embedded only once and cache the result
Fixing the offset of vertical CJK text
Merge pull request #3494 from SSk123/master

Fixing the offset of vertical CJK text