htop: add --HEAD, switch to distribution on main site

Closes #13.

Signed-off-by: Andrew Janke <andrew@apjanke.net>

Formula/htop.rb

@@ -1,8 +1,9 @@
 class Htop < Formula
   desc "Improved top (interactive process viewer)"
-  homepage "https://github.com/hishamhm/htop"
-  url "https://github.com/hishamhm/htop/archive/2.0.1.tar.gz"
-  sha256 "636c1e8b703058e793e8d25423af4b74059290ef9e48fa261ba58555069517b5"
+  homepage "https://hisham.hm/htop/"
+  url "https://hisham.hm/htop/releases/2.0.1/htop-2.0.1.tar.gz"
+  sha256 "f410626dfaf6b70fdf73cd7bb33cae768869707028d847fed94a978e974f5666"
+  revision 1
 
   bottle do
     sha256 "b8afe978bc97ef2d18767c769941b81e0501c20566d2427e2e421bb69ca94e5a" => :el_capitan
@@ -10,17 +11,22 @@ class Htop < Formula
     sha256 "47fd6612ee8889637c3aa47a6c8cdc5812b8b8f8fa4853f35f2131bb8da43884" => :mavericks
   end
 
+  head do
+    url "https://github.com/hishamhm/htop.git"
+
+    depends_on "autoconf" => :build
+    depends_on "automake" => :build
+    depends_on "libtool" => :build
+  end
+
   option "with-ncurses", "Build using homebrew ncurses (enables mouse scroll)"
 
-  depends_on "autoconf" => :build
-  depends_on "automake" => :build
-  depends_on "libtool" => :build
   depends_on "homebrew/dupes/ncurses" => :optional
 
   conflicts_with "htop-osx", :because => "both install an `htop` binary"
 
   def install
-    system "./autogen.sh"
+    system "./autogen.sh" if build.head?
     system "./configure", "--prefix=#{prefix}"
     system "make", "install"
   end