Changed
- (Python) Core project now depends only on `numpy`.
If you want to download samples files or create
sparse matrices, say `pip install bed-reader[samples,sparse]`.
- (Python) Added new `read_sparse()` method for creating
`sympy.sparse.csc_matrix` and `sympy.sparse.csr_matrix`. This
method can save memory when a *.bed file contains mostly zeros.
- (Rust) Rust methods that returned `Result` now return
`Result<_,Box<BedErrorPlus>>`. Before, they returned
`Result<_, BedErrorPlus>`. This saves memory.