Added netcdf package support.

var/spack/packages/netcdf/package.py

+from spack import *
+
+class Netcdf(Package):
+    """NetCDF is a set of software libraries and self-describing, machine-independent 
+	data formats that support the creation, access, and sharing of array-oriented 
+	scientific data."""
+
+    homepage = "http://www.unidata.ucar.edu/software/netcdf/"
+    url      = "ftp://ftp.unidata.ucar.edu/pub/netcdf/netcdf-4.3.3.tar.gz"
+
+    version('4.3.3', '5fbd0e108a54bd82cb5702a73f56d2ae')
+
+    # Dependencies:
+	# >HDF5
+    depends_on("hdf5")
+
+    def install(self, spec, prefix):    
+        configure(
+		"--prefix=%s" % prefix, 
+		"--disable-dap", # Disable DAP.
+		"--disable-shared", # Don't build shared libraries (use static libs).
+		"CPPFLAGS=-I%s/include" % spec['hdf5'].prefix, # Link HDF5's include dir.
+		"LDFLAGS=-L%s/lib" % spec['hdf5'].prefix) # Link HDF5's lib dir.
+		
+        make("install")
+
+	# Check the newly installed netcdf package. Currently disabled.
+	# make("check")