Renaming tanzania water test graphics to more appropriate filenames.
Merge branch 'master' of github.com:lambdatronic/clj-span

Conflicts:
	test/clj_span/tanzania-water-flow-dirs-mean.png
	test/clj_span/tanzania-water-intake-distances-mean.png
	test/clj_span/tanzania-water-serviceshed-mean.png
	test/clj_span/tanzania-water-stream-flow-dirs-mean.png
	test/clj_span/tanzania_elevation_mean.png
	test/clj_span/tanzania_pics/tanzania_distance_to_serviceshed_outlet.png
	test/clj_span/tanzania_pics/tanzania_elevation.png
	test/clj_span/tanzania_pics/tanzania_flow_dirs_all.png
	test/clj_span/tanzania_pics/tanzania_flow_dirs_rivers.png
	test/clj_span/tanzania_pics/tanzania_flow_dirs_serviceshed.png
	test/clj_span/tanzania_pics/tanzania_rivers.png
	test/clj_span/tanzania_water_mean.png
	test/figures/tanzania-water-flow-dirs-mean.png
	test/figures/tanzania-water-intake-distances-mean.png
	test/figures/tanzania-water-serviceshed-mean.png
	test/figures/tanzania-water-stream-flow-dirs-mean.png
	test/figures/tanzania_elevation_mean.png
	test/figures/tanzania_water_links_and_others.png
	test/figures/tanzania_water_mean.png
Merging my filename corrections with Ioannis'.