Add a few time series dataset and models

[tremblerz]

This paper mentions a lot of time series classification task and we would like to include some of them in SONAR. Whoever is going to work on it first should select 5 datasets (see this paper for a list of datasets) that they think are the most relevant datasets for SONAR (criterion can include large number of samples, large number of time steps in the time series, easily downloadable etc. The contributor will also have to write a model and integrate it into SONAR for this task.