GitLab

Building in-source and running the test suite in-source both leave
many artifacts that we (purposely) do not cover via `.gitignore`.
For developing CMake we typically use out-of-source builds, so
suggest this in the README.

Inspired-by: Bartosz Kosiorek <bartosz.kosiorek@tomtom.com>

CMake can now compile as C++11 on all supported platforms.  Check that
std::unique_ptr is available and fail early if missing.  This will allow
us to use C++11 more broadly in CMake's implementation (previously it
was restricted to the serve mode implementation).

Co-Author: Daniel Pfeifer <daniel@pfeifer-mail.de>

CMake will soon require both C++11 and libuv to build.  Neither of
these works on HP-UX, so unfortunately we need to drop support for
the platform until someone can get them working.

Issue: #17137

It was left out accidentally.

Convert to a bullet list.  Drop platforms for which we no longer have
nightly testing.

Kitware Robot authored Dec 14, 2016 and Brad King committed Dec 14, 2016

Code extracted from:

    https://gitlab.kitware.com/utils/kwsys.git

at commit 95a7e234ffd0c6bdfaa8b21c59a119198c050164 (master).

Upstream Shortlog
-----------------

Ben Boeckel (1):
      e0967411 Add a script to help update third-party sources

Brad King (10):
      98505f79 Add script to update GitSetup from upstream
      365edba8 GitSetup: Tell Git not to export .gitattributes
      41a7fe5b Add pre-commit hook to check whether SetupForDevelopment must re-run
      17a1200c Convert developer setup scripts away from Gerrit Code Review
      5f206c3a Tell Git to use a distinct conflict marker size in `.rst` files
      33f828d4 README: Convert from `.txt` to `.rst` markup
      56b707dd README: Add section about reporting bugs
      140357ea CONTRIBUTING: Document contribution through the Kitware GitLab Instance
      4b7bf8e4 Tell Git not to export any `.sh` or `.bash` scripts
      e25eb8dc CONTRIBUTING: Add step for running developer setup script

GitSetup Upstream (3):
      fed3d191 GitSetup 2012-09-27 (341043cf)
      a0144297 GitSetup 2016-12-13 (8af10838)
      868c1e68 GitSetup 2016-12-13 (cd5ada6d)

The latter is now the preferred URL for visiting cmake.org with a
browser.  Convert using the shell code:

 git ls-files -z | xargs -0 sed -i 's|http://www\.cmake|https://cmake|g'

Reported-by: Radovan Bast

Suggested-by: Petr Bena <benapetr@gmail.com>

Use the name "Kitware" rather than "Kitware, Inc." to simplify the text.
Provide a CMake-specific URL.

Rename 'Readme.txt' to 'README.rst', format the documentation as
reStructuredText, and modernize the content.  Also add a new
'CONTRIBUTING.rst' explaining the preferred entry path for new
contributors.