Added using UnityEngine; to UpdateInputManager

using UnityEngine; needs to be added the the UpdateInputManager demo otherwise Unity throws an error saying "The type or namespace name `MonoBehaviour' could not be found. Are you missing a using directive or an assembly reference?"
Merge pull request #25 from RyanNielson/patch-1

Update README.md.
Optimizations to reduce per frame allocations (#26).
Merge branch 'develop' of github.com:pbhogan/InControl into develop
Don't check in Library folder.
Remove Library/* files from repo.
Possible fix for Window Store Apps (#27)
Merge branch 'refs/heads/develop'
Solution updates.
Adding linux support for the Dualshock 4
Project updates.
Merge branch 'develop' of git://github.com/rje/InControl into rje-develop

Conflicts:
	Assembly-CSharp-Editor-vs.csproj
	Assembly-CSharp-Editor.csproj
	Assembly-CSharp-vs.csproj
	Assembly-CSharp.csproj
	InControl-csharp.sln
	InControl.sln
	ProjectSettings/Physics2DSettings.asset
Support for PS4 controller on Linux (issue #33)
Mad Catz support on Mac (issue #28)
Increased number of analogs to 20 (issue #29)

Unity3D bumped this value in version 4.3.3
Updated README.
Restructuring the project to be package friendly.
Automatically generate the InputManager.asset file when necessary.
Logitech F310 support on Windows and Mac (#40)
Project restructuring.