Set project version to 3.6.3 and add release notes

Fix FindMKL script for GNU OpenMP threading layer

(cherry picked from commit 95615a3)

Fix include dirs command in unified cmake script

(cherry picked from commit c26152f)

Add Tegra toolchain support

BUGFIX: Add support for broadcasting weights when using mean.

Merge pull request arrayfire#1844 from arrayfire/devel

Release v3.5.0

Merge pull request arrayfire#1682 from arrayfire/hotfix-3.4.2

Release v3.4.2

Merge pull request arrayfire#1623 from arrayfire/hotfix-3.4.1

Release v3.4.1

Merge pull request arrayfire#1589 from arrayfire/devel

Release v3.4.0

Merge pull request arrayfire#1394 from arrayfire/hotfix-3.3.2

Release 3.3.2