Etcher versions

v1.3 [Jan 5, 2018]
- Fix "stdout maxBuffer" error on Linux.
- Fix Etcher not working / crashing on older Windows systems.
- Fix not all partitions being unmounted after flashing on Linux.
- Fix selection of images in folders with file extension on Mac OS.
- Update Electron to v1.7.11.

v1.2 [Nov 26, 2017]
- Display actual write speed.
- Add the progress and status to the window title.
- Add optional progress bars to drive-selector drives.
- Increase the flashing speed of usbboot discovered devices.
- Add eye candy to usbboot initialized devices.
- Integrate Raspberry Pi’s usbboot technology.
- Fix bzip2 streaming with the new pipelines.
- Remove Linux elevation meant for usbboot.
- Fix LIBUSB_ERROR_NO_DEVICE error at the end of usbboot.
- Gracefully handle scenarios where a USB drive is disconnected halfway through the usbboot procedure.
- Make sure the progress button is always rounded.
- Fix permission denied issues when XDG_RUNTIME_DIR is mounted with the noexec option.
- Fix Etcher being unable to read certain zip files.
- Fix “Couldn’t scan the drives: An unknown error occurred” error when there is a drive locked with BitLocker.
- Fix “Missing state eta” error when speed is zero.
- Fix “Stuck on Starting…” error.
- Fix situations where the process would get stuck while flashing.
- Add the Python version (2.7) to the CONTRIBUTING doc.
- Remove duplicate debug enabling in usbboot module.
- Update Electron to v1.7.9.

v1.1 [Jul 21, 2017]
- Prevent “percentage above 100%” errors on DMG images.
- Fix Etcher not starting flashes in AppImages.
- Fix most “Unmount failed” errors on macOS.