better centering of the map
added view generating geojson for world map
coloring and click control
added map legend
zoom world map to fit all layers
popup on hover over polygons
Functional updatable answers
Merge pull request #42 from icrni/homepage_map

Homepage map
Merge branch 'master' into answers

Conflicts:
	django_project/imagery_requests/templates/request_view.html
	django_project/web/static/css/custom.css
Merge pull request #43 from dodobas/answers

Answers
potential fix for homepage map
Merge pull request #44 from icrni/homepage_map

potential fix for homepage map