rename changelog from txt to markdown
Merge pull request #58 from financeCoding/changelog_nit

rename changelog from txt to markdown
Release 1.4.3 on pub
Updated noise library, used code from Andrew Magill
Merge pull request #60 from johnmccutchan/better_noise

Updated noise library
Add setRotationMatrix().
setRotationMatrix(): expand comments and add test case.
Merge pull request #62 from udhos/master

Add setRotationMatrix().