Fixes
-=-=-=

-Added missing quaternion constructor
-code completion fixes
-winrt fixes
fixed bugs in polygon_path_finder for finding nearest points
Merge pull request #1014 from romulox-x/pathFinderBugs

fixed bugs in polygon_path_finder for finding nearest points
Filter unrecognized parameters passed from the command line
Fix iOS simulator build
Add OSX and iOS Xcode projects
Add the option skip_build [yes/no] to the SCons build system to skip the build process (compiling/linking) generating only the platform dependent sources
Add the SCons scripts to the Xcode projects
Add release flags to the iOS Xcode project and couple of missing source files
Add commpressed executable files for iOS
Add missing return value