Merge pull request #45 from Nateckert/generic_programming

Add note about the DefaultAllocator constraint.

Fix the Allocator type parameters in the generic programming page.

Some additions to the generic programming page.

Fix typos

Add traits and matrix example

Correct typos

Add section for functions and structs

Fix dimforge/nalgebra#1224 (#81)

update old function names (hermitian_eigen) in user guide (#68)

use file path rather than url paths (#89)

fix typo in Cargo.toml snippet; change `netlib` -> `openblas` (#67)

Corrected the dimforge link in the support page from .org to .com (#85)

update site to docusaurus 3.5 + yarn to 4.5

correct api key