timeside/analyzer/max_level.py: use AnalyzerResultContainer
timeside/analyzer/dc.py: use AnalyzerResult
timeside/analyzer/: factorise max_level and rms_level
tests/test_analyzer_dc.py: new test, making test_analyzing.py obsolete
timeside/analyzer/core.py: fix u'' in xml
timeside/analyzer/core.py: add to_json() to AnalyzerResult
timeside/analyzer/core.py: add __eq__ to AnalyzerResultContainer
Merge branch 'aubio' of github.com:yomguy/TimeSide into aubio