Remove nose imports, fix warnings

geomagio/WebService.py

test/Controller_test.py

test/ObservatoryMetadata_test.py

test/TimeseriesUtility_test.py

test/Util_test.py

test/WebService_test.py

test/algorithm_test/AdjustedAlgorithm_test.py

test/algorithm_test/Algorithm_test.py

test/algorithm_test/AverageAlgorithm_test.py

test/algorithm_test/SQDistAlgorithm_test.py

test/algorithm_test/XYZAlgorithm_test.py

test/edge_test/EdgeFactory_test.py

test/edge_test/MiniSeedFactory_test.py

test/edge_test/RawInputClient_test.py

test/iaga2002_test/IAGA2002Factory_test.py

test/iaga2002_test/IAGA2002Parser_test.py

test/imfjson_test/IMFJSONWriter_test.py

test/imfv122_test/IMFV122Parser_test.py

test/imfv283_test/IMFV283Parser_test.py

test/pcdcp_test/PCDCPFactory_test.py