Add license and citation file

CITE

@@ -0,0 +1,25 @@
+If you use VERBENA in your research, please make sure that you reference the 
+first article listed below.
+
+Chappell, M.A., Mehndiratta, A., Calamante F., "Correcting for large vessel 
+contamination in DSC perfusion MRI by extension to a physiological model of the 
+vasculature", e-print ahead of publication. doi: 10.1002/mrm.25390
+
+The following articles provide more background on the original vascular model 
+from which the VERBENA model is derived:
+
+Mouridsen K, Friston K, Hjort N, Gyldensted L, Østergaard L, Kiebel S. Bayesian 
+estimation of cerebral perfusion using a physiological model of microvasculature. 
+NeuroImage 2006;33:570–579. doi: 10.1016/j.neuroimage.2006.06.015.
+
+Ostergaard L, Chesler D, Weisskoff R, Sorensen A, Rosen B. Modeling Cerebral 
+Blood Flow and Flow Heterogeneity From Magnetic Resonance Residue Data. J Cereb 
+Blood Flow Metab 1999;19:690–699.
+
+An alternative Bayesian 'non-parametric' deconvolution approach has been 
+published in:
+
+Mehndiratta A, MacIntosh BJ, Crane DE, Payne SJ, Chappell MA. A control point 
+interpolation method for the non-parametric quantification of cerebral 
+haemodynamics from dynamic susceptibility contrast MRI. NeuroImage 
+2013;64:560–570. doi: 10.1016/j.neuroimage.2012.08.083.

LICENSE

@@ -0,0 +1,53 @@
+    LICENCE
+
+    VERBENA package, Release 4.0 (c) 2017 The University of Oxford 
+    (the "Software")
+
+    The Software remains the property of the University of Oxford ("the
+    University").
+
+    The Software is distributed "AS IS" under this Licence solely for
+    non-commercial use in the hope that it will be useful, but in order
+    that the University as a charitable foundation protects its assets for
+    the benefit of its educational and research purposes, the University
+    makes clear that no condition is made or to be implied, nor is any
+    warranty given or to be implied, as to the accuracy of the Software,
+    or that it will be suitable for any particular purpose or for use
+    under any specific conditions. Furthermore, the University disclaims
+    all responsibility for the use which is made of the Software. It
+    further disclaims any liability for the outcomes arising from using
+    the Software.
+
+    The Licensee agrees to indemnify the University and hold the
+    University harmless from and against any and all claims, damages and
+    liabilities asserted by third parties (including claims for
+    negligence) which arise directly or indirectly from the use of the
+    Software or the sale of any products based on the Software.
+
+    No part of the Software may be reproduced, modified, transmitted or
+    transferred in any form or by any means, electronic or mechanical,
+    without the express permission of the University. The permission of
+    the University is not required if the said reproduction, modification,
+    transmission or transference is done without financial return, the
+    conditions of this Licence are imposed upon the receiver of the
+    product, and all original and amended source code is included in any
+    transmitted product. You may be held legally responsible for any
+    copyright infringement that is caused or encouraged by your failure to
+    abide by these terms and conditions.
+
+    You are not permitted under this Licence to use this Software
+    commercially. Use for which any financial return is received shall be
+    defined as commercial use, and includes (1) integration of all or part
+    of the source code or the Software into a product for sale or license
+    by or on behalf of Licensee to third parties or (2) use of the
+    Software or any derivative of it for research with the final aim of
+    developing software products for sale or license to a third party or
+    (3) use of the Software or any derivative of it for research with the
+    final aim of developing non-software products for sale or license to a
+    third party, or (4) use of the Software to provide any service to an
+    external organisation for which payment is received. If you are
+    interested in using the Software commercially, please contact Isis
+    Innovation Limited ("Isis"), the technology transfer company of the
+    University, to negotiate a licence. Contact details are:
+    [email protected] quoting reference DE/9564. 
+