Added 'Locator Should Match X Times' keyword similar and more generic version of 'Xpath Should Match X Times' keyword and test.
add method _find_element_by_partial_text
QAR-48273: Fixed build failure caused by extra content in output.xml
QAR-48273: Applied fix for 'Choose File' bug, from Helio Guilherme (532295cbce)
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
add links to INSTALL and BUILD files
doc updates related to loglevels and logging
fixes #253
fix JavaScript kw doc
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.
Update test_elementfinder.py

add test_find_by_partial_link_text
document partial link strategy