v0.2.0

Breaking change

• BLASError handling: change to String (allow alloc in no_std)

Refactor

• use custom FFI binding, remove dependency of blas-sys and libc

Additional change

• feature warn_on_copy and error_on_copy: give warn message if explicit memory copy is required
• feature ilp64 ILP64 BLAS support
• feature gemmt ?GEMMT support
• Document update

Fix

• dimension k=0 of SYRK, SYR2K