added hackathon to home page
added hackathon to home page

NEONScience/NEON-Data-Skills,NEONScience/NEON-Data-Skills,mjones01/NEON-Data-Skills,mjones01/NEON-Data-Skills,mjones01/NEON-Data-Skills,NEONScience/NEON-Data-Skills,NEONScience/NEON-Data-Skills