Completed proposed UI & started data model

Tweeked the heightPicker look & feel
Started a data model class to pass around the selected DistantObject
Started changing the flip side pickers to the new version (objectName,
height & units)
Set up gitignore

Still struggling with this process
Merge branch 'CPLsCurrentCopy'

Conflicts:

RangeFinder.xcodeproj/project.xcworkspace/xcuserdata/chris.xcuserdatad/U
serInterfaceState.xcuserstate