Converted Visual Studio include paths to relative paths.

 - Include paths were specified with absolute paths, which break as soon as the project is moved to a different location. (e.g., when cloning to a new computer from GitHub).
 - Include paths are now specified relative to the project file, so everything should work as long as the entire XPC directory is present.
Merge pull request #9 from jwatkins42/master

Converted Visual Studio include paths to relative paths.
Merge pull request #10 from nasa/Testing-Scripts

Testing scripts
Merge pull request #11 from nasa/Testing-Scripts

Added C Testing Scripts
Merge pull request #15 from nasa/Testing-Scripts

Completed Preliminary MATLAB Test Scripts
Renamed C Test Functions
Merge pull request #16 from nasa/Testing-Scripts

Fixed bug in xplaneConnect.c
Fix

Merge branch 'master' into Testing-Scripts

Conflicts:
	TestScripts/C Tests.xcodeproj/project.xcworkspace/xcuserdata/cteubert.xcuserdatad/UserInterfaceState.xcuserstate
	TestScripts/Cpp Tests.xcodeproj/project.xcworkspace/xcuserdata/cteubert.xcuserdatad/UserInterfaceState.xcuserstate