Merge pull request #60 from Wu-Hao/master

fix AI bug
Merge pull request #61 from Wu-Hao/master

added mage spikes
Fix new ui bugs;
Add models' frame value table
Modify pig model
add archer
Merge pull request #62 from calfjohn/master

add archer
Merge pull request #63 from RaoZiJian/master

2 commits
fixed rotation bug.
Merge branch 'master' into dev
add dragon and slime
New rat c3b
Merge pull request #64 from RaoZiJian/master

New rat c3b
rename manager to pool
Merge branch 'master' into dev
Modify new piglet model
Merge pull request #65 from RaoZiJian/master

Modify new piglet model
update GameMaster
fixed a bug in create BasicCollider (maxRange) and change normal attack duration of mage and archer
add rat and dragon
add ArcherNormalAttack and ArcherArrowRainFall