text: Title: add brainIAK citation for SRM module
  Body: From the BrainIAK readme: 
  
  ```
  Please cite BrainIAK in your publications as: "Brain Imaging Analysis Kit, http://brainiak.org." Additionally, if you use RRIDs to identify resources, please mention BrainIAK as "Brain Imaging Analysis Kit, RRID:SCR_014824". Finally, please cite the publications referenced in the documentation of the BrainIAK modules you use, e.g., SRM.
  https://github.com/IntelPNI/brainiak
  ```
  
  The most obvious place, I think, would be to paste in the reference here: http://hypertools.readthedocs.io/en/latest/hypertools.tools.align.html#hypertools.tools.align