release-3.2.6

• Bugfix: Testsuite failed with Matlab R2025a because cell2mat no
  longer throws exception for mismatched data types. See issue #155.
  (Thanks to Nick Tufillaro.)

• Add LD_PRELOAD suggestion in guide. (Thanks to Nick Tufillaro.)

• Suppress a linker warning by passing LDFLAGS='-z noexecstack' to MEX.

• Bugfix: Add arm64 to ARCH in Makefile, for compatibility with Mac M1
  architecture. See issue #153. (Thanks to Daniel Lester.)

• Bugfix: reset global TOL in train_helper.cpp (Matlab remembers
  globals!). See issue #152. (Thanks to Giuseppe Di Labbio.)

• _USE_MATH_DEFINES before including <cmath> for MinGW-w64
  compiler. (Thanks to Giuseppe Di Labbio.)