add logic to deal with reading in of files where the fitting is split over the...

add logic to deal with reading in of files where the fitting is split over the positive and negative regimes.

solventmapcreator/solvationcalculation/solvationmapgenerator.py

@@ -91,7 +91,12 @@ def parse_polynomial_data_file_extract_polynomial_coefficients(filename,
     """This parses a polynomial file and gets the coefficients for the given
     polynomial order.
     """
-    return parse_polynomial_data_file(filename)[polynomial_order]["coefficients"]
+    polynomial_information = parse_polynomial_data_file(filename)[polynomial_order]
+    if "positive" in polynomial_information.keys():
+        return {"positive":polynomial_information["positive"]["coefficients"],
+                "negative":polynomial_information["negative"]["coefficients"]}
+    else:
+        return polynomial_information["coefficients"]
 
 def parse_polynomial_data_file(filename):
     """This parses a polynomial data file, and extracts the information