add some axis flipping to try to make fsl happy
Merge remote-tracking branch 'group/master'

Conflicts:
	lib/Core/DataStorage/image.hpp
astyle -r --suffix=none --formatted --options=design/astylerc *.{c,h}pp
set version to 0.7.3
Merge branch 'master' into fsl
prevent "Unknown" entries for the dicom dictionary
make ImageFormat_NiftiSa::guessSliceOrdering a bit more robust against weird images
have a bit more generic flipping in nifti_sa
improve fsl support in nifti_sa (should conform to "Chris Rorden's dcm2nii :: 12 12 2012" now)
Merge branch 'fsl'
when reading dicom remove AcquisitionNumber if its a duplicate of InstanceNumber
make the sanity check for the slice distance less picky and other cosmetics
use vector3 for diffusionGradient
fix bug when byteswapping floating point data
add test and benchmark for byteswap
Merge branch 'master' of github.com:DerOrfa/isis

Conflicts:
	lib/ImageIO/imageFormat_nifti_sa.cpp
astyle -r --suffix=none --formatted --options=design/astylerc *.{c,h}pp
set version number to 0.7.4
try to handle dicom tags with unknown formatting
use ImageIO as logging module in data::IOFactory