"their is" -> "there is"
BF: fixed the dtype issue by forcing the type to np.float64
COSMIT: Cleaned test_field
COSMIT: a pass on test_graph
ENH: Avoid the systematic casting to np.float64 in dilation function
ENH: update docstring and remove one copy
BF Fixed the case of empty set of regions in bsa -- to be further checked
A pass on bsa module: simplifications, redundancy removal, more explicit variable naming
More changes in related modules: variable naming, API
More variable renaming and simplifications
Proceed with updates of the Functional landmark stuff
NF: add script to build dmg files from buildbots

The buildbots build mpkgs; this script builds dmgs from the mpkgs and
sets the permissions correctly.
NF: add tool for doctest for extensions

Fetched from the dipy/tools directory.
Further simplifications on the landmark learning structure
Simplified again the landmark API
DOC: tiny changes in release notes

That I missed somehow.
DOC: fix typo; change dipy to nipy

From comments by Bertrand
DOC: point to newer function for rolling axes

We were pointing to the old deprecated function.
RF: add time and slice axes arguments to screens

The ``screens`` utility assumed time last and slice second-to-last. Get
screens to look for 't' axis (will nearly always be last, but often
set), or accept suggestion from arguments; ditto for slice axis.
RF: make default slice axis adapt to time axis

Add tests for slice axis and time axis specified.

This is minor API breakage, because previous default behavior was:

    time_axis=-2, slice_axis default -> -2
    time_axis=0, slice_axis_default -> -2

Now:

    time_axis=-2, slice_axis default -> -1
    time_axis=0, slice_axis_default -> -1