platform update
Update Rectangle
add plateformSpeed
add move method
update platform move method
Merge branch 'master' of https://github.com/beckbaibai/pvt

Conflicts:
	client/game.client.js
Continuous platforms showed
Merge branch 'master' of https://github.com/beckbaibai/pvt

Conflicts:
	client/game.client.js
	shared/game.shared.platform.js
Merge branch 'master' of https://github.com/beckbaibai/pvt

Conflicts:
	client/game.client.js
	shared/game.shared.state.js