Selenium-assist

Add `extra_timeout` to `click_element`.

**Full Changelog**: https://github.com/ivanmicetic/selenium-assist/compare/v0.3.2...v0.3.3

Add `execute_script` helper function.

**Full Changelog**: https://github.com/ivanmicetic/selenium-assist/compare/v0.3.1...v0.3.2

Switch to selenium>3.
Add `continue_on_error` flag.
Implemented helper functions:
- connect_webdriver
- load_page
- wait_for_presence
- wait_for_visibility
- click_element
- send_keys
- hoover_over_element
- switch_to_iframe
- get_table_data
- get_element_text

**Full Changelog**: https://github.com/ivanmicetic/selenium-assist/compare/v0.2.5...v0.3.1

Add skip_check to send_keys.

**Full Changelog**: https://github.com/ivanmicetic/selenium-assist/compare/v0.2.4...v0.2.5

Fix get filename of main module.

**Full Changelog**: https://github.com/ivanmicetic/selenium-assist/compare/v0.2.3...v0.2.4

Fix get filename of main module.

**Full Changelog**: https://github.com/ivanmicetic/selenium-assist/compare/v0.2.2...v0.2.3