Change the time of saving players' position.
Merge branch 'master' of https://github.com/Wu-Hao/TankMultiplayer

Conflicts:
	Classes/GameScene.cpp
Merge branch 'master' of https://github.com/Wu-Hao/TankMultiplayer
add some pics and fixed some bugs.
fixed bug: ready success jump.
add Readme.md
Merge pull request #31 from fusijie/master

add Readme.md