Bug fixes:
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* Add test of requirements.txt parsing for runtime requirements #1127
* Set PY_VCRUNTIME_REDIST for VS 2015+, so that DLL linkage is used #1129
* Use os.path.normpath in find_lib #1132
* Fix path prepending in test (use only PATH, and use consolidated code) #1135
* Add dist split for channel names #1136
* Provide fallback path to render recipe when build environment is necessary for rendering #1140
* Sort package versions coming from PyPI for skeleton #1141

Contributors:
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* @mingwandroid
* @msarahan