Added brew for librasterlite

RasterLite is an add-on to the SpatiaLite GIS extention to Sqlite3
databases.  RasterLite allows the storage of raster imagry as PNG,
GeoTIFF, GIF or JPEG imagas or using Wavelet Compression.

In addition to a library, RasterLite includes tools for managing raster
imagry in sqlite databases.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Formula/librasterlite.rb

@@ -0,0 +1,19 @@
+require 'formula'
+
+class Librasterlite <Formula
+  url 'http://www.gaia-gis.it/spatialite/librasterlite-1.0.tar.gz'
+  homepage 'http://www.gaia-gis.it/spatialite/'
+  md5 'c6f7864ac6101ff63f8aec4b02603b46'
+
+  depends_on "libgeotiff"
+  depends_on "libspatialite"
+
+  def install
+    # For PNG support
+    ENV.x11
+    system "./configure", "--disable-debug", 
+                          "--disable-dependency-tracking", 
+                          "--prefix=#{prefix}"
+    system "make install"
+  end
+end