Clic on toilets

Added clic capabilities on Toilets and UserPosition, hence a minor refactoring on 'addInfos.js'.
Also added layers to easily activate/deactivate markers on the map (only for infos bubbles at the moment).

A major refactoring would be necessary to be able to recalculate closest toilets based on filters. Need help for that matter (i did heavily improve my Promises-skills, but still not good enough to handle them through refactoring T_T).

Globally, code is a mess :/