modifications to prototype

[judithfan]

• Highlight each stroke for user in the native sequence in which they were generated and have them select a subpart label.
• Subpart "children" menu items inherit the same color as the part "parent" menu items
• stroke_data object to be sent to separate mongo db/collection: to be a dictionary that contains all the metadata that was initially fetched from stimuli, as well as new fields for the user-provided part and subpart labels.
• Set up and test stroke_data insertion into mongodb. dbname = semantic_parts_v2; colname = graphical_conventions_run5. Note: There should always be a field called iterationName that is set to development or testing during testing/development.
• Modify setup.js so that we fetch multiple sketches from the stimuli db to annotate in each session.
• Write up detailed README.md on organization of part_annotation.js and setup.js
• Subpart "children" menu items to appear to the right of the part "parent" menu items