Add calcurse package

packages/calcurse.rb

+require 'package'
+
+class Calcurse < Package
+  description 'calcurse is a calendar and scheduling application for the command line.'
+  homepage 'http://calcurse.org/'
+  version '4.3.0'
+  source_url 'http://calcurse.org/files/calcurse-4.3.0.tar.gz'
+  source_sha256 '31ecc3dc09e1e561502b4c94f965ed6b167c03e9418438c4a7ad5bad2c785f9a'
+
+  binary_url ({
+  })
+  binary_sha256 ({
+  })
+
+  def self.build
+    system "./configure --prefix=#{CREW_PREFIX}"
+    system 'make'
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+end