add readme template

cprog does now create a README.md file with default content
add make clean

added clean section in make file to remove compiled binaries
Merge pull request #1 from sharlander/extendmakefile

add make clean
Merge pull request #2 from sharlander/readme

add readme template
change licence to file

remove the lic folder and replace it with the LICENCE file in project
root
clean makefile

removes licence.c from makefile which is not needed anymore as the
licence is in gnu.c
Merge branch 'lic_to_file' of https://github.com/sharlander/cprog into lic_to_file

* 'lic_to_file' of https://github.com/sharlander/cprog:
  clean makefile
  change licence to file

Conflicts:
	makefile
	src/code.c