tests/test_AnalyzerResult.py: add more tests
timeside/analyzer/core.py: serialize using numpy.array.tolist
timeside/analyzer/core.py: remove hack on xml, always use repr() and eval()
timeside/analyzer/core.py: use default default_flow_style
tests/test_aubio_temporal.py: test results serialization
timeside/analyzer/core.py: use ast.literal_eval for safe parsing
timeside/analyzer/core.py: do not convert value to string