Orca training data error and README.md typo

[scottveirs]

Hey,

I just spot-checked your classification data set and it seems like a valuable addition to our annotation efforts. I've added a link to your efforts within Orcasound's orcadata wiki where we are trying to track the open model development process for orca signals.

I did find one true negative that contains a faint SRKW signal. 587.wav contains a faint SRKW call. This may have been due to an error in my initial labeling effort, or a bug in your code for generating the no/call clips and annotations.

For modelers interested in orca echolocation, please note that many of the true negative samples contain prominent (high SNR) echolocation clicks (e.g. 584.wav)

Also, in the orca README, the intro ends with what appears to be an errant phrase:
s are the most widespread primate genus.

Finally, you could add in the metadata/description that these orca signals are from the Southern Resident Killer Whale ecotype.

[scottveirs]

@radekosmulski