- Feature #633 (and its children #626, #634, #635, #636, #637, #639, #640): Refactor heavily InputParameter utility: now it is possible to use as many subsections as you wish, whereas previously only one depth level was allowed. Macros have been removed and replaced by classes; many boilerplate operations are no longer required (for instance no need to define section for each input parameter). - Feature #624: XCode/git remove the gitattributes lines that was there to help merge of XCode project (it no longer works with current XCode). - Feature #620: Extend former InterpolateToSubsetFeltSpace so that interpolation can also occur from a finite element space to a bigger one. A test case has been provided as well. - Feature #605: Refactor Dirichlet boundary conditions, so that variable conditions may be used (as vel_fluid = vel_solid for instance).