IE11 fixes (Frank Danek)

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9306 5f5364db-9458-4db8-a492-e30667be6df6
remove method deprecated since 2.13

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9307 5f5364db-9458-4db8-a492-e30667be6df6
fix the deprecate version no

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9308 5f5364db-9458-4db8-a492-e30667be6df6
more detailed and robust test, code cleanup

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9309 5f5364db-9458-4db8-a492-e30667be6df6