Merge pull request v923z#428 from v923z/fix-4d

fix sum for 4D arrays

Merge pull request v923z#408 from v923z/attr-prop

implement ndarray properties

Merge pull request v923z#388 from v923z/gc-fix

fix garbage collection problem

move release pointer

increment version number

updated version number

Merge pull request v923z#298 from v923z/std-fix

Std fix

Merge pull request v923z#299 from v923z/legacy-std-fix

fixed the calculation of the standard deviation on iterables

Merge pull request v923z#291 from v923z/openmv

adds option to override pre-processor constants

Merge branch 'numpy-scipy'

Moving to complete numpy compatibility