Make time period of interest more flexible

[sheilarabun]

Currently, the script can be set to find all publications/collaborations starting on Jan. 1 of a given year, up to the present day that the script was run. Thus, the resulting visualization shows an aggregation of collaborations within the specified time frame.

Ideally, there would be more flexibility within the script to parse multiple time frames, so that the visualization could be more dynamic and perhaps interactive, showing changes in collaboration activity over time.