Add CMake script to allow user to `make framework` for iOS

Change-Id: Id28edc209bd8406129f757fada076050d80ffc3f
Remove shell script for creating VTK framework; update iOS readme

Change-Id: I19f5a6850ab0bdc659b755d38658606e514ee0bd
Update CMakeLists for iOS examples

Also, set vtk.framework path in Xcode projects to CMake default.

Change-Id: Iebe4b9eff435c26ef8d6a254487275198ac8f23e
Merge topic 'improve-ios-cmake' into master

628febb8 Update CMakeLists for iOS examples
48752aec Remove shell script for creating VTK framework; update iOS readme
7465b7b4 Add CMake script to allow user to `make framework` for iOS