add TimerManager
TimeManager is building to manage timer for update on the same time
this commit also let countdown aply this setting.
rename timer getStatus method to isTimeUp
also simplify countdown.lua source code
add "addTimeLife()" method on timer
Randomly barbarian
add campfire
Merge branch 'master' into fntsrlike

Conflicts:
	classes.lua
	main.lua
	r.lua
comment something todo at campfire
Merge branch 'master' of https://github.com/raincole/isr

Conflicts:
	classes.lua
	main.lua
Fix timer
Walking barbarians
Update name
Merge branch 'davy_working' of github.com:raincole/isr

Conflicts:
	assets/images/bab_1.png
	assets/images/bab_2.png
	game/timer.lua
	main.lua
Add animation

Add fire animation to player with stick and stick