first revision of afni4d support
refactored afni slice save into containing formset- fixed bugs with edit&save
added upload folder support for afni4d
allow brackets in nifti name urls
added image validation script (wip)
added conversion script
refactored for DRYness and fixed tag copying
Added unit test for 4D afni slicing, with test reference 4D file.
Merge pull request #37 from infocortex/enh/afni4d

Enh/afni4d