Verifies all traces of current Stream against available meta data.
Example
>>> from obspy import Trace, Stream
>>> tr = Trace(data=np.array([1, 2, 3, 4]))
>>> tr.stats.npts = 100
>>> st = Stream([tr])
>>> st.verify()
Traceback (most recent call last):
...
Exception: ntps(100) differs from data size(4)