studentlife data in RData format

This is the studentlife dataset, converted from it's original form (hosted at https://studentlife.cs.dartmouth.edu/dataset.html) into a series of R tibbles (which are similar to a data.frame) and stored in the RData format, for compression / speed and ease of use with R. Note, in this RData format the dataset takes up much less space than the original. These tibbles are suitable for use with the studentlife R package https://github.com/frycast/studentlife which is also available on CRAN, but we recommend installing the latest version from GitHub. Studentlife dataset reference: Wang, Rui, Fanglin Chen, Zhenyu Chen, Tianxing Li, Gabriella Harari, Stefanie Tignor, Xia Zhou, Dror Ben-Zeev, and Andrew T. Campbell. "StudentLife: Assessing Mental Health, Academic Performance and Behavioral Trends of College Students using Smartphones." In Proceedings of the ACM Conference on Ubiquitous Computing. 2014.