Fix IAGA2002 channel parser:

Handles case of broken IAGA2002 file where the channel headers don't align perfectly with the expected columns. Our IAGA2002 files never did this, but some from others did.

geomagio/iaga2002/IAGA2002Parser.py

@@ -132,10 +132,11 @@ class IAGA2002Parser(object):
         Creates empty values arrays in ``self.data``.
         """
         iaga_code = self.metadata["station"]
-        self.channels.append(line[30:40].strip().replace(iaga_code, ""))
-        self.channels.append(line[40:50].strip().replace(iaga_code, ""))
-        self.channels.append(line[50:60].strip().replace(iaga_code, ""))
-        self.channels.append(line[60:69].strip().replace(iaga_code, ""))
+        # self.channels.append(line[30:40].strip().replace(iaga_code, ""))
+        # self.channels.append(line[40:50].strip().replace(iaga_code, ""))
+        # self.channels.append(line[50:60].strip().replace(iaga_code, ""))
+        # self.channels.append(line[60:69].strip().replace(iaga_code, ""))
+        self.channels.extend(line.replace("|", "").replace(iaga_code, "").split()[3:7])
 
     def _parse_data(self, line):
         """Parse one data point in the timeseries.