fixed a bug in create BasicCollider (maxRange) and change normal attack duration of mage and archer
add ArcherNormalAttack and ArcherArrowRainFall
damage is related on defend  and 15% increase or decrease by random
Merge branch 'master' of https://github.com/fusijie/FantasyWarrior3D

Conflicts:
	src/Mage.lua
Merge pull request #68 from calfjohn/master

3 commits