fix qexponential; add rq kernels; update examples #32

Job	Run time
run_examples	7m 38s
run_unit_tests (main, with-extras)	5m 3s
run_unit_tests (stable, no-extras)	1m 40s
run_unit_tests (main, no-extras)	3m 9s
run_unit_tests (stable, with-extras)	3m 19s
run_unit_tests (stable, with-extras)	3m 19s
run_unit_tests (main, with-extras)	4m 56s
run_unit_tests (stable, no-extras)	1m 40s
run_examples	7m 38s
run_unit_tests (main, no-extras)	3m 9s
	41m 31s

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