Create new empty repos for secondary and tertiary projects

[trgardos]

@mvoong18 to create empty repos in BU-Spark for secondary project (ml-herbarium-classify) and tertiary to (ml-herbarium-phenology), or better names.

[funkyvoong]

• secondary task repo: https://github.com/BU-Spark/ml-herbarium-classify
• tertiary task repo: https://github.com/BU-Spark/ml-herbarium-phenology