Modernize spec file

.rpmlint

@@ -0,0 +1,2 @@
+from Config import *
+addFilter("spelling-error .* deskewing");

unpaper.spec

@@ -1,16 +1,16 @@
 Name:           unpaper
 Version:        0.3
-Release:        14%{?dist}
+Release:        15%{?dist}
 Summary:        Post-processing of scanned and photocopied book pages
-
 Group:          Applications/Publishing
 # Licensed under any GPL version since none is specified
 License:        GPL+
-URL:            http://unpaper.berlios.de
+URL:            http://unpaper.berlios.de/
 Source0:        http://download.berlios.de/%{name}/%{name}-%{version}.tar.gz
 Patch0:         unpaper-0.3-format-security.patch
-BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
-
+BuildRequires:  coreutils
+BuildRequires:  gcc
+BuildRequires:  sed
 
 %description
 unpaper is a post-processing tool for scanned sheets of paper, especially for
@@ -21,37 +21,33 @@ quality of scanned pages before performing optical character recognition (OCR).
 unpaper tries to clean scanned images by removing dark edges that appeared
 through scanning or copying on areas outside the actual page content (e.g. dark
 areas between the left-hand-side and the right-hand-side of a double- sided
-book-page scan). The program also tries to detect disaligned centering and
+book-page scan). The program also tries to detect misaligned centering and
 rotation of pages and will automatically straighten each page by rotating it to
 the correct angle. This process is called "deskewing".
 
-
 %prep
 %setup -q
 %patch0 -p1
-
+# fix eol encoding in LICENSE
+sed -i -e 's/\r//' LICENSE
 
 %build
-(cd src && gcc $RPM_OPT_FLAGS -o unpaper unpaper.c -lm)
-
-# fix eol encoding in LICENSE
-sed -i 's/\r//' LICENSE
+cd src
+gcc $RPM_OPT_FLAGS $RPM_LD_FLAGS -o unpaper unpaper.c -lm
 
 %install
-rm -rf $RPM_BUILD_ROOT
 install -d $RPM_BUILD_ROOT/%{_bindir}
 install -p -m 0755 src/unpaper $RPM_BUILD_ROOT/%{_bindir}
 
-%clean
-rm -rf $RPM_BUILD_ROOT
-
-
 %files
-%defattr(-,root,root,-)
+%license LICENSE
 %{_bindir}/*
-%doc doc CHANGELOG LICENSE README
+%doc doc CHANGELOG README
 
 %changelog
+* Thu Jul 07 2016 Petr Pisar <ppisar@redhat.com> - 0.3-15
+- Modernize spec file
+
 * Fri Feb 05 2016 Fedora Release Engineering <releng@fedoraproject.org> - 0.3-14
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_24_Mass_Rebuild