strainGradient: Isogeometric analysis based strain gradient elasticity code. For numerical formulation details refer to: S. Rudraraju, A. Van der Ven, K. Garikipati, ”Three-dimensional iso-geometric solutions to general boundary value problems of Toupin’s gradient elasticity theory at finite strains”, Computer Methods in Applied Mechanics and Engineering (2014) DOI: 10.1016/j.cma.2014.06.015 http://authors.elsevier.com/sd/article/S0045782514002011. Requires deal.ii library available from http://www.dealii.org/download.html