Replaces pythons web server
Makes sure the results are send /handled in right order
Migrating test.py to test.js
Removes test.py
Handles HTTP redirects
Disables range requests for chrome windows during testing
Cleaning up the viewer and pdfbug; fixes repeats in Stepper
Implements importl10n command
Removing translations not present in Aurora: they will be replaced in the next commit with proper language codes
Importing all locales from mozilla-aurora, keeping our own metadata.inc files
Merge pull request #4504 from timvandermeij/importl10n

Import l10n files from mozilla-aurora
[Firefox] Only load 'PdfStreamConverter' and 'PdfRedirector' when PDF.js is enabled
Merge pull request #4525 from Snuffleupagus/firefox-move-module-import

[Firefox] Only load 'PdfStreamConverter' and 'PdfRedirector' when PDF.js is enabled
Partially reverts #3641
Merge pull request #4527 from yurydelendik/revert3641

Partially reverts #3641
Fix error message typo

It should read 'PDFFindController cannot be initialized without a PDFFindBar instance'.
Merge pull request #4519 from yurydelendik/pdfbugclean

Cleaning up the viewer and pdfbug; fixes bugs in Stepper
Merge pull request #4515 from yurydelendik/nodetest

Replaces test.py with test.js
Merge pull request #4529 from stratosv/patch-1

Fix error message typo
Fix typo in test/ttx/README.md