add city via click - nearly there

failing to resolve city name
reorganised code - add isCity to utils
created newCity function in cities
Cosmetic changes
Cosmetic changes
Merge branch 'finalise-zombieWar-Phase-1' into finish-coding-zombieTracker

Conflicts:
	html/03_custom_overlays/04_zombie_tracker.html
wrapped first two sessions

more documentation, translation and layout changes
content and layout of landing page
added Altran icon to footer
reduced size of "loading a map" series
refactored listeners
connected / finalised "add city" in zombie tracker
Merge pull request #10 from yomiBazuaye/finish-coding-zombieTracker

Finish coding zombie tracker