Better implementation of varzm
Implement varm using centralize_sumabs2
add `@inbounds` to sqrt!
clean up the variable naming for mean functions
Clean up parameter naming for var, std, and friends
Merge pull request #7205 from JuliaLang/dh/stats3

Improved implementation for var and std
Fix return type for inv(StridedMatrix)
Bump OpenBLAS and LAPACK.

Update to OpenBLAS 0.2.9 and LAPACK 3.5.0
Add checksums for openblas 0.2.9, and LAPACK 3.5.0
Remove LAPACK 3.4.2 patches (for slasd4 and dlasd4). Fixed in 3.5.0.
Remove openblas 0.2.9rc1 checksum
Remove openblas osx10.9 patch, which was required for openblas 0.2.8
The OpenBLAS gemv bug is fixed now (#6941), and we can call gemv
Add a test for #6941