Delete DS_Store.
Create a interface called Calculator for mortgage calculation;
Merge branch 'master' of https://github.com/LCYY/DimBoard

Conflicts:
	.gitignore
	DimBoard/.DS_Store
	DimBoard/DimBoard.xcodeproj/project.xcworkspace/xcuserdata/conicacui.xcuserdatad/UserInterfaceState.xcuserstate
	DimBoard/DimBoard.xcodeproj/xcuserdata/conicacui.xcuserdatad/xcdebugger/Breakpoints.xcbkptlist
	DimBoard/DimBoard/OveralInfoViewController.m
	DimBoard/DimBoard/ViewController.m