Lint: ideas from recent submission

[jankatins]

These probably come from using a conda skeleton pypi ...

• if the URL contains a long link to the pypi location, ask it to be changed to https://pypi.io/packages/source/<first letter of package>/<package>/<filename>
• If it contains a git link and a tag (instead of a commit ID), tell it to include a real commit id instead of a tag
• if bld.bat or build.sh is just python setup.py install (or the setuptools variant) suggest removing this and adding the line to the meta.yml
• if recipe contains an install dependency on setuptools, check that the python call uses --single-version-externally-managed --record=record.txt
• check for the version declaration at the top of the file and that it is used in all lines whichuse a version (filename, URL, version)
• check for some licenses: BSD/BSD license -> BSD 3-clause and Python -> PSF -- see issue ( Check the license string #88 )
• if it contains # List any patch files here or # noarch_python: True suggest removing these skeleton remnants

[jakirkham]

Have changed these to checklist items so it is easier to track progress. Also the license check is already another issue, so noted that next to that line.

[jakirkham]

If it contains a git link and a tag (instead of a commit ID), tell it to include a real commit id instead of a tag

Should add that I'm not sure how I feel about this one.