Build: Added possibility to set jqueries using environment variable JQUERIES
(cherry picked from commit 700aa8cbd2663dfa1a8416469b6db726dc4b6426)
CI: Set build matrix to test against different versions of jQuery (  another attempt at )
(cherry picked from commit 5290032fa417097e761268a5b1788f4a466ea4e8)

Conflicts:
	.travis.yml