Add auto-updating of youtube-dl version in ISSUE_TEMPLATE
Move parts of template text and adopt makefile to new format
Moved the 'kind-of-issue' section and rephrased a bit
Rephrased and moved Example URL section upwards
Moved ISSUE_TEMPLATE inside .github folder.
Update makefile to match new folderstructure
It's the portable version of BSD make: http://crufty.net/help/sjg/bmake.html
The syntax for conditionals is different in GNU make and BSD make, so we use the shell