* CSC: Create constructor for unsorted but otherwise valid data
* Test creating csc matrix from unsorted but valid data
* Add function for validation and sorting
* Move validation function to cs.rs
* Restore pattern unit test
* Add unit test for 'major offset out of bounds' case
* Avoid permutation allocations on 'happy path'
* Reuse allocated permutation
* Fix comments for test-data examples
* Remove unnecessary iter variable
* Set up buffers for sorting up front
* Use common apply_permutation function
* Use common compute_sort_permutation function
* Move unsafe down to unchecked call
* Add panic cases to documentation
* Remove unnecessary Zero bound
* Move buffer set up away from loop
* Lift T::Zero from cs.rs
* Improve checking if values are provided
* Simplify copying from slices & add test for wrong values length
* Check duplicates after sorting
* Fix formatting
* Check values length at the beginning
* Check length of values if values != None
After much deliberation, I have come to the conclusion that the
benefits do not really outweigh the added complexity. Even though
the added complexity is relatively minor, it makes it somewhat
more complicated to inter-op with other sparse linear algebra
libraries in the future.
