Tests and examples of individual parts

[JetamZ]

No description provided.

[matyaskopp]

invalid time numbers

I found suspicious numbers:

ParlaStats/test/MetadataExtraction/examples/expected/expectedReal.txt

Lines 9 to 12 in 6f4069d

	total duration: 190520.0
	total spoken: 75000.0
	time silent: -26850.0
	time unknown: 142370.0

No time should be negative.

I hope I understand the labels correctly: |total duration| = |total spoken| + |time silent| + |time unknown|
Where total duration is the length of the time frame first anchor in utterance ... last anchor in utterance.
So it is not total length of utterance, because som nonaligned text can be at the beginning/end.

[matyaskopp]

test data

It would be also good to add some sample data, where a utterance overlaps the page (corresponds to multiple audio files).