Merge pull request #154 from yarikoptic/master

initiate a Changelog
Revert "This must be 0.2.0 -- adjusting version for the release"

This reverts commit a9a6f11e9d842461f6494d8b7e703840ad4b7fce.

Not ready for release yet - sorry Yarik!
RF: specify dependency on nibabel 1.2
RF: remove affines code present in nibabel 1.2

Remove apply_affine, append_diag, to_matrix_vector, from_matrix_vector
RF: remove onetime, tmpdirs duplicate nibabel code

Both onetime and tmpdirs have been in nibabel for some time.
RF: remove parametric testing decorator

The decorator was not helping much because the tests would stop if one
test failed in a test function.  Hence it's simpler to use non-generator
functions with multiple tests.
RF: remove coordmap argument to image.fromarray

The argument didn't make much sense because if you have a coordmap
already, ``Image(data, coordmap)`` is the right way to create the image.

Closes gh-30.
RF: update code causing deprecation warnings

Particularly use of img.get_shape() instead of img.shape, but also use
of to_filespec, and img.header.
DOC: update docstring for fromarray

Specify that identity affine maps input to output.
DOC - docstring / whitespace reformatting
DOC - update utils docstring

Out of date; we moved external packages to their own tree.
DOC - docstring, whitespace formatting

And added helpful (to me) import lines in docstring
Merge pull request #158 from matthew-brett/nibabel-1.2

Depend on Nibabel 1.2

Specify dependency on nibabel 1.2 and remove duplicate code
Merge pull request #159 from matthew-brett/remove-parametric

RF: remove parametric testing decorator

The decorator was not helping much because the tests would stop if one
test failed in a test function. Hence it's simpler to use non-generator
functions with multiple tests.
Merge pull request #161 from matthew-brett/remove-nibabel-deprecations

RF: update code causing deprecation warnings

Particularly use of img.get_shape() instead of img.shape, but also use
of to_filespec, and img.header.
Merge pull request #164 from matthew-brett/misc-doc-style-cleanups

Misc doc style cleanups

Whitespace changes and docstring cleanups.
RF: mv module clustering into utils

This is to avoid having the same name for the module and for the package
which can cause some confusion
Merge pull request #156 from jbpoline/rename-clustering-module

RF: mv module clustering into utils
merged test_dmtx
STY: pep8 in model.py