recipes1
fixed GITHUB_USER
descriptions of document targets and ci
misc fix
misc fix'n typos
PKGDIR to PKG back for RECIPES.md
misc fix
typo
Merge pull request #14 from lbraglia/recipes

Recipes
replace ifeq(xyz,) by ifndef(xyz)
set default goal to help target

If you use own targets in your .makerrc the first own target would be used as
default instead of the "help" target if you call `make PKG=packagename`.
This commit overwrite the default target and `make PKG=packagename` shows always
the "help" output.
separate PKG and PKGDIR; closes #13

This commit adds a new variable PKGDIR which replaces most use cases of PKG. PKG
is now used for building/naming the tarball and PKGDIR points to the source
directory (that contains the DESCRIPTION file).