Merge pull request #25 from RaoZiJian/master

Calculate the UI position by windows size
remove hero after dead.
Merge branch 'master' of github.com:fusijie/FantasyWarrior3D
remove three  variables: mage , monster , warrior
Merge pull request #26 from calfjohn/master

remove three  variables: mage , monster , warrior
Merge branch 'master' of https://github.com/fusijie/FantasyWarrior3D