Squashed 'nidm/' changes from 74c8ef4..a95b9f6

a95b9f6 Merge pull request #158 from cmaumet/niftiCase
5fdbd66 Use MIME type image/nifti as value for dct:format attribute
3dd4859 Merge pull request #169 from cmaumet/originalFilenames
144c316 filename can be attribute of nidm:Image
e9dba6a add: filename attribute in all map entities with location
1f524cc Merge pull request #154 from nicholsn/enh/experiment
b1a79b5 Merge pull request #153 from nicholsn/enh/dataset-descriptors
b896047 nidm:filename is sameAs OBO's digital document name
105c78f nidm:originalFileName -> nidm:filename
109dd62 add: experiment acquisition level
d0aab63 add: experiment mr study level
7c76b8d add: experiment study question level
f62f3f5 add: experiment project level
707a51c rm: generic descriptor
ff09265 add: distribution level aggregate descriptor
3102783 add: distribution level component descriptor
f97ec75 add: version level descriptor
ae4d01a add: summary level project descriptor
ea32e9c add: summary level database descriptor

git-subtree-dir: nidm
git-subtree-split: a95b9f67302dfbeb14c778d54fb68fd86a8ab30b
Merge commit '43907c68cf5bbc7102dfa10f77622e98672f5515' into updateNIDMsubtree