version up to 0.4 and minor formatting

CHANGES.rst

@@ -1,4 +1,4 @@
-0.4.0 (unreleased)
+0.4.0 (2016-09-06)
 ------------------
  - Whole cube convolution & reprojection has been added, including tools to
    smooth spectrally and spatially to force two cubes onto an identical grid.
@@ -11,9 +11,11 @@
  - Added a new cube type, VaryingResolutionSpectralCube, meant to handle
    CASA-produced cubes that have different beams in each channel
    (https://github.com/radio-astro-tools/spectral-cube/pull/292)
- - Added tests for new functionality in OneDSpectrum (https://github.com/radio-astro-tools/spectral-cube/pull/277)
+ - Added tests for new functionality in OneDSpectrum
+   (https://github.com/radio-astro-tools/spectral-cube/pull/277)
  - Split out common functionality between SpectralCube and LowerDimensionalObject
-   into BaseNDClass and SpectralAxisMixinClass *Manually merged by @keflavich* (https://github.com/radio-astro-tools/spectral-cube/pull/274)
+   into BaseNDClass and SpectralAxisMixinClass
+   (https://github.com/radio-astro-tools/spectral-cube/pull/274)
  - added new linewidth_sigma and linewidth_fwhm methods to SpectralCube for
    computing linewidth maps, and make sure the documentation is clear that
    moment(order=2) is a variance map.

setup.py

@@ -46,7 +46,7 @@
 builtins._ASTROPY_PACKAGE_NAME_ = PACKAGENAME
 
 # VERSION should be PEP386 compatible (http://www.python.org/dev/peps/pep-0386)
-VERSION = '0.3.3.dev'
+VERSION = '0.4.0'
 
 # Indicates if this version is a release version
 RELEASE = 'dev' not in VERSION