small changes

minor changes after Bart convo
Added vertical slider to RangeFinderVC

Added vertical slider & started configuring the camera overlay
(reticleView) for alternate zoom mode
Added helpView screens

provided a translucent view for help instructions
Merge commit '262514d0c77a08c21caa6d57f6ae6ff8290bb89e'

Conflicts:
	FlipsideViewController.h
	HeightFinderViewController.m
	MainViewController.h
	MainViewController.m
	RangeFinder.xcodeproj/project.pbxproj
	RangeFinder.xcodeproj/project.xcworkspace/xcuserdata/chris.xcuserdatad/UserInterfaceState.xcuserstate
	RangeFinder/FlipsideViewController.m