Tor Browser for Windows 6.0

# All Platforms
* Update Firefox to 45.1.1esr
* Update OpenSSL to 1.0.1t
* Update Torbutton to 1.9.5.4
- Make Torbutton compatible with Firefox ESR 45
- Pref to hide 'Sign in to Sync' button in hamburger menu
- Hide unusable items from help menu
- Allow users to more easily set a non-tor SSH proxy
- Provide shortcuts for New Identity and New Circuit
* Translation updates
* Code clean-up
* Update Tor Launcher to 0.2.9.3
- Do not store data in the application bundle
- Tor Browser is not starting on OS X if put into /Applications
- Setup wizard UI flow improvements
- Translation updates
* Update HTTPS-Everywhere to 5.1.9
* Update meek to 0.22 (tag 0.22-18371-3)
- Bug: Symlinks are incompatible with Gatekeeper signing
- Bug: Mac OS: meek-http-helper profile not updated
- Bug and child tickets: Rebase Tor Browser patches to ESR 45
- Bug: Fix broken updater on Linux
- Bug: The update.xml hash should get checked during update
- Bug: Disable SHA1 certificate support
- Bug: Disable libmdns support for desktop and mobile
- Bug: Disable additional welcome URL shown on first start
- Bug: Exempt our extensions from signing requirement
- Bug: Disable MediaDevices.enumerateDevices
- Bug: Disable HTTP Alternative-Services
- Bug: Disable Mozilla's tracking protection
- Bug: Disable performance-based WebGL fingerprinting option
- Bug: Disable Selfsupport and Unified Telemetry
- Bug: Disable Network Tickler
- Bug: Remove DNS lookup in lockfile code
- Bug: Disable dom.push preferences
- Bug: Remove the JS-based Flash VM (Shumway)
- Bug: Disable MozTCPSocket explicitly
- Bug: Place Canvas MediaStream behind site permission
- Bug: Verify cache isolation for Request and Fetch APIs
- Bug: Fix OCSP and favicon isolation for ESR 45
- Bug: Disable <link rel="preconnect"> for now
- Bug: Exempt the meek extension from the signing requirement as well
- Bug: Don't copy Torbutton, TorLauncher, etc. into meek profile
- Bug: Test importScripts() for cache and network isolation
- Bug: Hide pocket menu items when Pocket is disabled
- Bug: Fix circuit isolation issues on Page Info dialog
- Bug: Tor Browser should not fall back to Bing as its search engine
- Bug: Use our search plugins in localized builds
- Bug: Zip our language packs deterministically
- Bug: Fix first-party isolation for blobs URLs in Workers
- Bug: Disable or audit Reader View
- Bug: Remove Pocket
- Bug: Tor Browser reports "InvalidStateError" in browser console
- Bug: Disable monitoring the connected state of Tor Browser users
- Bug: Don't show error after add-on directory clean-up
- Bug: Disable the option of logging TLS/SSL key material
- Bug: SVGs should not show up on Page Info dialog when disabled
- Bug: Spoof screen.orientation values
- Bug: Disable Heartbeat prompts
- Bug: Use English-only label in <isindex/> tags
- Bug: Investigate server logging in esr45-based Tor Browser
- Bug: Add unit tests for keyboard fingerprinting defenses
- Bug: Regression test to ensure CacheStorage is disabled
- Bug: Add automated tests for updater cert pinning
- Bug: Add test cases for favicon isolation
- Bug: Remove some FTE bridges
# Windows
- Bug: Support ICU in Windows builds
- Bug: Context menu is broken on Windows in ESR 45 based Tor Browser
# OS X
- Bug: Support OS X Gatekeeper
- Bug: Tor Browser should not store data in the application bundle
- Bug: HTTPS-E is missing after update
- Bug: meek-http-helper profile not updated
- Bug: Upgrade is not smooth (requires another restart)
# Build System
* All Platforms
- Bug: Add LXC support for building with Debian guest VMs
- Bug: Don't use BUILD_HOSTNAME anymore in Firefox builds
- Bug: Remove unused keys and unused dependencies
* Windows
- Bug: Use NSIS 2.51 for installer to avoid DLL hijacking
- Bug: Bump mingw-w64 commit we use
* OS X
- Bug: Update toolchain for Firefox 45 ESR
- Bug: Switch to Debian Wheezy guest VMs
* Linux
- Bug: Stripping fails due to obsolete Browser/components directory
- Bug: Include libgconf2-dev for our Linux builds
- Bug: Switch to Debian Wheezy guest VMs (10.04 LTS is EOL)