Add mutators

* Add get/set methods to modify or retrieve GMSH geo parameters
  directly in the application source code.
Rename geo getters to feelpp standard
Merge branch 'develop' of github.com:feelpp/feelpp into feature/geomod
update issue #158
@StephaneVeys test_lambda works now ok. There are still some features of the
language which do not support the Lambda framework and you still need to pass
the function operators (id, grad, ...) and not the function itself.
Hopefully I will be able to fix that soon
bump up to feel++ 0.95.0
update ChangeLog
0.94.0 will not be released publicly due to a technical issue while doing a prerelease
fix parallel domain decomposition

Conflicts:
	feel/feelalg/graphcsr.cpp
	feel/feelalg/matrixpetsc.cpp
	feel/feeldiscr/createsubmesh.hpp
	feel/feeldiscr/stencil.hpp
	feel/feelfilters/importergmsh.hpp
add interface for PETSc submatrix and test

Conflicts:
	feel/feelalg/matrixpetsc.cpp
update issue #15
use unordered_map<> instead of map<> (should be much faster, could be nice to
compare this branch with the develop branch)
added some new command line options

Conflicts:
	doc/manual/laplacian/CMakeLists.txt
	feel/feeldiscr/doftable.hpp
added options for gmsh.domain
make renumber dof optional

Conflicts:
	feel/feeldiscr/doftable.hpp
	quickstart/laplacian.cpp
fix sequential case: in sequential subksp were overriding the ksp
try to have better log info
@vincentchabannes @asamake Now use the Dof data structure to store the global dof
information and not a tuple (Dof derives from a tuple for backward
compatibility)
define also LocalDof and LocalDofSet for the new dof_Table data structure
which allows to go back and forth between the local and global dof using boost::bimap
update issue #160
@vincentchabannes @asamake Now use the Dof data structure to store the global dof
information and not a tuple (Dof derives from a tuple for backward
compatibility)
define also LocalDof and LocalDofSet for the new dof_Table data structure
which allows to go back and forth between the local and global dof using boost::bimap

Conflicts:
	.dir-locals.el
Merge branch 'develop' of github.com:feelpp/feelpp into feature/geomod
@dolleg @asamake implement dof_marker using bimap
remove warnings
added interface for extracting values depending on the marker

Conflicts:
	doc/manual/laplacian/laplacian_quad.cpp
	feel/feeldiscr/doftable.hpp
	feel/feelfilters/gmshhypercubedomain.cpp
added options for gmsh.domain
now everything is customizable from section gmsh.domain
loadMesh() by default loads a hypercube domain and passes now all options from
loadMesh() and associated options
added rebuild option to gmsh section
added rebuild option to gmsh section
added laplacian with dirac on the right hand side
@feelpp/feelpp @feelpp/dot here is an simple example  in 2D of a laplacian
with a dirac on the right habd side