ncurses package builds ncurses and ncursesw (#3953)

* ncurses package will build ncurses and ncursesw

* Added libs property to ncurses, added fix for hstr

* flake8 is a harsh mistress

* make libs() more robust

* atop depends on ncurses

* fish depends on ncurses

* libtermkey and nano depend on ncurses

* Adjust url spacing

var/spack/repos/builtin/packages/hstr/package.py

@@ -40,3 +40,4 @@ class Hstr(AutotoolsPackage):
     depends_on('libtool',  type='build')
     depends_on('m4',       type='build')
     depends_on('ncurses@5.9')
+    depends_on('readline')