Unity 46 ui

Enemy attack + visual feedback when enemy attacks and either player or enemy takes damage.
For now enemy behavior is very basic. It may be useful in the future to use a real state machine (cf the series of tutorial at http://unitygems.com/fsm1/).
Some things could be factored between player health script and enemy health script
Factored enemy stats (max hp, attack speed, damage) in a single script to make tweaking easier
Added Radius property
Changed the way "NumberOfUses" was handled