Follow the instructions at "https://pkgdocs.julialang.org/v1/environments/#Using-someone-else's-project"
Currently there are 3 main sets of functions.
ContinuedFractions.jl contains code for working with continued fractions
FreeGroup.jl and Homomorphisms.jl has code for working with words in the free group and homomorphisms between free groups
FareyWords.jl has code for computing Farey and Christoffel words
See examples/ for how to use some of these functions