Release Name: 0.3

Notes:
0.3
Add PET/CT support, multi-frame and multi-image support, and noise matching
* New templates for PIB, FBP, FTP, FDG, CT
* Support for multi-frame (4D .nii) inputs, and multiple (separate .nii) inputs
* Attempt to match noise intensity and PSF of input image, and apply this to the template image (on by default, can be disabled with -matchNoise 0). This visually improves images and was necessary for support of unfiltered dynamic PET images; it has measurable but very small benefits to downstream volume measurements from T1 MRI as well.
* Coincides with the first release of our accompanying ADIR_nii2dicom utility
* Add -altReg parameter to try an alternate registration scheme when the original fails
* Add -threads parameter to control multithreading during reg_aladin and antsApplyTransforms, but it has minimal effect. Default is 1 (they used to use the maximum available)
* Fixes for users who rely on non-standard LD_LIBRARY_PATH for dependencies to function (MUST use run_mri_reface.sh)
* Output deFaced.nii will now match the bit depth and scl_slope/scl_inter of the original input .nii. Previously they would be upsampled to floats.
* Primary outputs of this version would be identical to 0.2 for MRI inputs if -matchNoise 0