ENH: add dcm_qa as a submodule and use in travis

[yarikoptic]

• verify that it all works ;) especially in view of Only in /home/yoh/deb/gits/pkg-exppsy/dcm_qa/Ref: fMRI_MB_int_26.{json,nii} neurolabusc/dcm_qa#5

would require learning a bit about git modules but IMHO it is the correct way to do it and bind version (commit) of dcm_qa into specific state of dcm2niix. If anything changes within dcm_qa, you would need first o push dcm_qa to github and then commit the change here

[yarikoptic]

oh so lovely -- look at the travis output -- looks like legit "failures" to me

[neurolabusc]

@ningfei: since @yarikoptic is modifying the files you are creating, perhaps you want to review them and if you are happy you can marge the pull request. In theory it is a nice idea to not only validate that the code compiles, but also validate sensible results.

[ningfei]

Looks cool! Just correct the reference json files (duplicated "InstitutionName"). Now the travis output should show "exited with 0".