Use more macros

To make it a bit easier to maintain multiple Shellfu/Bash libraries, we
want to have sort of "template" and keep every module as close to it as
practical.

mkit.ini

     doc   = [ENV:PREFIX]/share/doc/shellfu-bash-saturnin
     sfmod = [ENV:PREFIX]/share/shellfu/include-bash
 
+[tokens]
+    __SHELLFU_MODNAME__ = saturnin
+
 [files]
     doc   = README.md
     sfmod = src/saturnin.sh

packaging/template.spec

 URL:        __MKIT_PROJ_VCS_BROWSER__
 License:    LGPLv2
 
+%define sfincb %{_datadir}/shellfu/include-bash
+%define sfmodn __SHELLFU_MODNAME__
+%define shellfu_req shellfu >= 0.10.4, shellfu < 0.11
+
 Source0:        %{name}-%{version}.tar.gz
 BuildArch:      noarch
-BuildRequires:  shellfu => 0.10
-BuildRequires:  shellfu < 0.11
+BuildRequires:  %shellfu_req
 BuildRequires:  shellfu-bash-inigrep
 BuildRequires:  shellfu-bash-pretty
 BuildRequires:  shellfu-sh-exit
 
-Requires: shellfu => 0.10
-Requires: shellfu < 0.11
+Requires: %shellfu_req
 Requires: shellfu-bash
 Requires: shellfu-bash-inigrep
 Requires: shellfu-bash-pretty
 
 %files
 %doc %{_docdir}/%{name}/README.md
-%{_datadir}/shellfu/include-bash/saturnin.sh
+%{sfincb}/%{sfmodn}.sh
 
 
 %changelog