libbraiding: init at 1.0

libbraiding is a new standard package for sage. See
https://trac.sagemath.org/ticket/25705

pkgs/development/libraries/science/math/libbraiding/default.nix

@@ -0,0 +1,34 @@
+{ stdenv
+, fetchFromGitHub
+, autoreconfHook
+}:
+
+stdenv.mkDerivation rec {
+  version = "1.0";
+  name = "libbraiding-${version}";
+
+  src = fetchFromGitHub {
+    owner = "miguelmarco";
+    repo = "libbraiding";
+    rev = version;
+    sha256 = "0l68rikfr7k2l547gb3pp3g8cj5zzxwipm79xrb5r8ffj466ydxg";
+  };
+
+  nativeBuildInputs = [
+    autoreconfHook
+  ];
+
+  # no tests included for now (2018-08-05), but can't hurt to activate
+  doCheck = true;
+
+  meta = with stdenv.lib; {
+    homepage = https://github.com/miguelmarco/libbraiding/;
+    description = "C++ library for computations on braid groups";
+    longDescription = ''
+      A library to compute several properties of braids, including centralizer and conjugacy check.
+    '';
+    license = licenses.gpl3;
+    maintainers = with maintainers; [ timokau ];
+    platforms = platforms.all;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -20500,6 +20500,7 @@ with pkgs;
 
   jags = callPackage ../applications/science/math/jags { };
 
+  libbraiding = callPackage ../development/libraries/science/math/libbraiding { };
 
   # We have essentially 4 permutations of liblapack: version 3.4.1 or 3.5.0,
   # and with or without atlas as a dependency. The default `liblapack` is 3.4.1