Cleanup

* move tags to check.url
* reuse coords(0) and coords(1) instead of lat lon
* add checks for other tags supported by Opening Hours Validator
* fix: every check should have a distinct name
* remove unnecessary printed messages
Add small icon for Opening Hours Validator

icon used in tools' combobox
Remove Jython modules from OpeningHoursValidator.py

Jython modules increase loading time of the script:
* disable logging
* substitute urllib.quote() with URLEncoder.encode()
Add Opening Hours Validator to README and CONTRIBUTORS
Update tools version to 0.2beta1

Add Opening Hours Validator to CHANGES.md and create JAR file
Activate warning for Opening Hours Validator and false positives