sdist: Simplify distribution building

* CMake sources or binaries will be re-downloaded. Since wheels can be
  generated by either building from source or re-packaging existing binaries,
  these is no point in systematically including the CMake sources.
* disabled running of cmake while doing sdist

Author: jcfr

Diff for: MANIFEST.in

@@ -1,8 +1,13 @@
 include CMakeLists.txt
+include CMakeUrls.cmake
 include requirements-dev.txt
 include HISTORY.rst
 include README.rst
+include LICENSE_Apache_20
+include LICENSE_BSD_3
+
+recursive-exclude _skbuild *
+recursive-exclude src *
 
-recursive-include src *
 include versioneer.py
 include cmake/_version.py

Diff for: scikit-ci.yml

@@ -39,7 +39,7 @@ before_build:
 
 build:
   commands:
-    - python setup.py --hide-listing sdist -- $<SETUP_CMAKE_ARGS>
+    - python setup.py --hide-listing sdist
     - $<RUN_ENV> python setup.py --hide-listing bdist_wheel $<SETUP_BDIST_WHEEL_ARGS> -- $<SETUP_CMAKE_ARGS>
 
   circle:

Diff for: setup.py

@@ -41,7 +41,6 @@ def parse_requirements(filename):
     packages=['cmake'],
 
     cmake_install_dir='cmake/data',
-    cmake_with_sdist=True,
 
     entry_points={
         'console_scripts': [