Fix trailing whitespace in docs/tutorial.rst.
Squashed 'docs/mypack/cmake/' content from commit 49e5385

git-subtree-dir: docs/mypack/cmake
git-subtree-split: 49e538534dfcb83af701418a035784b80bd83c7b
Merge commit '72799b0201270bc39bbd875066249ea45e540141' as 'docs/mypack/cmake'
Add CMake build example for mypack tutorial docs.
Merge pull request #43 from thewtex/mypack_cmake

Mypack CMake tutorial build docs and code.
Merge branch 'master' of github.com:xdress/xdress