Stable version of Segmentation.praat

Some key functionality of this version of the Segmentation.praat script:

* Trial number, target word, and repetition number are added automatically for each trial;
* The segmenter can quit and resume segmenting;
* The script notifies the segmenter of consecutive trials of the same target word and automatically determines the correct suffix for the context labels of that trial's segmentations;
* Subjects with trial time-data and without trial time-data are treated the same, so the segmenter doesn't have to be trained on two different protocols.