reading MFNWT File and small SR change (#333)
reading MFNWT File and small SR change (#333)

* Modified sr.export_contours and sr.export_array_contours to make use of sr projection info if available

* mfnwt.py - enabled reading in a file with comments after the first data line (pythonified the reading too)

aleaf/flopy,aleaf/flopy,jentjr/flopy,jentjr/flopy