Added 'Clear Text' keyword for clearing the text value of a text entry element.
Added 'Locator Should Match X Times' keyword similar and more generic version of 'Xpath Should Match X Times' keyword and test.
Added test for new 'Clear Text' keyword.
add method _find_element_by_partial_text
QAR-48165: Added support for negative indexes in Robot keywords
QAR-48165: Added tests for negative indexes, tidied code
QAR-48165: Removed unnecessary import of jQuery
doc updates related to loglevels and logging
log level trace not supported
Moved 'Locator Should Match X Times' acceptance test.

Moved test from test/acceptance/keywords/elements.txt to
test/acceptance/keywords/content_assertions.txt.
Renamed new 'Clear Text' keyword to 'Clear Element Text'

Renamed keyword to match corresponding and already existing keyword in the
Selenium2Library Java port. Update acceptance tests and removed invalid tests.
Update test_elementfinder.py

add test_find_by_partial_link_text
Document partial link strategy
Fix url retrieval

See http://www.w3schools.com/jsref/prop_doc_url.asp
This refs #281
add default prefix and support prefixes with spaces
fix unit test for bad prefixes
Pass window.id through if not None
thank the thankless
improve doc for default locator prefix
fixes #200

Totally unrelated change I know.