Pywebrunner

Changed
- Removed js_errorcollector by default. Enabled kwarg option.

Changed
- (Python 3) Fixed byte encoding on chromedriver version in URL.

Added
- Adding ability to fill in OTP fields using known secret

Added
- Adding 'chrome-headless' option.
- `-p, --processes` flag for webrunner. (Number of simultaneous browser instances)
- Add set_window_size method
- Add refresh method
- Add maximize_window method
- Add add_cookie method
- Add delete_cookie method
- Add delete_all_cookies method

Changed
- Update Selenium requirement

Added
- Update Gecko
- Fix geckodriver download
- Try to fix Gecko on start.

Added
- download method
- save_image method