fvecs reader for Rust

I've been working with the SIFT1M data set and its siblings quite a lot recently but the way we read their .fvecs files are not the most straightforward. So, I've implemented this so that I don't have to rewrite/copy over the file reader every time I need to do something with that data set again.

Quick Round-up of Functions(?)

• load_fvecs: It's basically the only function in this thing. It takes in the following parameters:
  • file_name specifies the path to the file as a string
  • d specifies the dimension of the vector data
  • n specifies how many vectors is in the data set

Disclaimer

This library(?) isn't really written to be robust. Still, feel free to open issues or pull requests to change it!