* make noexternallink: chekc for Lines with no source/demo/other link
* make missinglicenselanguage: check Lines with only 1 or no language/license entry
* make contrib: print list of contributors
* make add: helper to add a new software entry
* add TODOs
* remove link to form since it is unmaintained and outputs wrongly formatted entries https://github.com/Kickball/awesome-selfhosted/issues/282#issuecomment-185423033
* add BEGIN/END SOFTWARE LIST markers to restrict processing to software list only (HTML comments, not rendered to markdown)
* link to README.md editor, issues, pull requests
* Requirements for Makefile: make, bash. Available in Linux distribution repositories, in XCode on Mac, in GOW on Windows.
* Fixes#461
Jarek Lipski