Added the installation files for the "TetGen" package.

var/spack/repos/builtin/packages/tetgen/package.py

@@ -0,0 +1,28 @@
+from spack import *
+
+class Tetgen(Package):
+    """TetGen is a program and library that can be used to generate tetrahedral
+       meshes for given 3D polyhedral domains. TetGen generates exact constrained
+       Delaunay tetrahedralizations, boundary conforming Delaunay meshes, and
+       Voronoi paritions."""
+
+    homepage = "http://www.tetgen.org"
+    url      = "http://www.tetgen.org/files/tetgen1.4.3.tar.gz"
+
+    version('1.4.3', 'd6a4bcdde2ac804f7ec66c29dcb63c18')
+
+    # TODO: Make this a build dependency once build dependencies are supported
+    # (see: https://github.com/LLNL/spack/pull/378).
+    depends_on('cmake@2.8.7:', when='@1.5.0:')
+
+    def install(self, spec, prefix):
+        make('tetgen', 'tetlib')
+
+        mkdirp(prefix.bin)
+        install('tetgen', prefix.bin)
+
+        mkdirp(prefix.include)
+        install('tetgen.h', prefix.include)
+
+        mkdirp(prefix.lib)
+        install('libtet.a', prefix.lib)