Sprout from master 2019-06-11 15:25:37 UTC Matthew Webster <mwebster@fmrib.ox.ac.uk> 'read4D to avoid calling legacy read'
Cherrypick from master 2009-03-31 10:49:37 UTC Matthew Webster <mwebster@fmrib.ox.ac.uk> 'fixed copyrights':
    fsl2ascii.cc
Cherrypick from fsl-5_branch 2014-02-12 12:05:15 UTC Matthew Webster <mwebster@fmrib.ox.ac.uk> 'Changes for new utils parser':
    fslcc.cc
Delete:
    avwfixfloat.cc
    doc/index.html
    fslcheck.cc
    fslcorrecthd.cc
    fsldecorr4d.cc
    fslfromascii.cc
    tests/avw2ascii_test.sh
    tests/avwcc_test.sh
    tests/avwcpgeom_test.sh
    tests/avwcreatehd_test.sh
    tests/avwhd_test.sh
    tests/avwinterleave_test.sh
    tests/avwmaths_test.sh
    tests/avwmerge_test.sh
    tests/avwnvols_test.sh
    tests/avwroi_test.sh
    tests/avwsplit_test.sh
    tests/fslswapdim_test.sh
    tests/header.xml
    tests/run_alltests.sh

Added an option -m for saving the matrix directly to a file, and also used tmpnam to avoid clashing outputs for temporary *_nii.mat file