换图
增加速度调节、存档按钮
Merge branch 'master' of https://github.com/LuciusYu/TownSimulator.git

Conflicts:
	TownSimulator-android/assets/data/building_low_cost_house.png
	TownSimulator/src/com/TownSimulator/entity/Man.java
	TownSimulator/src/com/TownSimulator/ui/building/selector/BuildComsButtonsGroup.java
	TownSimulator/src/com/TownSimulator/ui/building/selector/BuildComsCategoryButton.java
	TownSimulator/src/com/TownSimulator/ui/building/selector/BuildComsUI.java