Squashed All Commits
Merge remote-tracking branch 'origin/master' into sonar-fixes

Conflicts:
	core/src/main/java/com/crawljax/core/configuration/CrawlAttribute.java
	core/src/main/java/com/crawljax/core/configuration/CrawlElement.java

Improvements: Closes firefox browser, most test pass (changed exception)

fixed three failing tests returing wrong objects

deleted commented out code
Merge branch 'master' of https://github.com/L2C5/crawljax