Feersum-nlu

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Updated the sentiment model to add additional emoji sentiment mainly to support thumbs up/down.

Tested and fixed the emotion rest API.

Added the active log file's name to the dashboard response to know which file to download when needed.

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Some example updates.

Changed the 'get_labels' rest api collection to a more resty 'labels'. No change to wrapper functions.

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Added an SVM classifier algorithm option to the text classifier. The supported algorithms now are naive_bayes, svm, nearest_neighbour_l1,
and nearest_neighbour_cosine.

Added `collection_uri` to the dashboard's model detail. It is the URI of the model type's collection resource e.g. /faq_matchers
for the collection of faq_matcher models. Typically it is just the plural of the model type.

The model's uuid is now also returned in the dashboard model detail. The model history includes the current version of the model
only if the last update was pushed to the history.

The dashboard now also returns any custom sentence_encoders (language_models) and image_encoders (vision_models) that is loaded
for the API key.

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Updated the 'update_samples' and 'update_samples'end points to just return a list of samples.

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Added 'update_samples' response to update samples endpoints.

Added a samples put/update endpoint to update samples by uuid.

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Updated the sample delete endpoints to allow one to delete samples by their UUIDs. The sample UUIDs are allocated by the
service and returned along with the samples from the get samples endpoints.