update issue #126 : store only the points belonging to elements associated to the processor 

update issue #101 : do not renumber the points id so that they are the same as in the Gmsh mesh
Merge branch 'develop' of https://github.com/feelpp/feelpp into feature/mesh
cleanup
some fixes
--warning
Merge branch 'feature/mesh' of https://github.com/feelpp/feelpp into feature/mesh
@StephaneVeys fix compilation
add vertices
update issue #126 
exporting changes due to changes in mesh point numbering
 - exporter ensight ok in sequential and parallel in 2D
 - exporter ensight gold ok in sequential in 2D
 - exporter gmsh ok in sequential in 2D
fix issue #101
update issue #101

added a matlab/octave code that loads the P1 function in feel++ and gmsh numbering
update issue #101 
now save matrix and rhs, solve in matlab and compare with feel++ solution
remove whitespaces
set a name to the petsc object in printMatlab() so that in the matlab file
the objects are properly named for easier usage
update issue #101
now provide relation in both direction
update issue #126
fix for the ensightgold format in the number of dof
update issue #101
fix compilation warning by changing printMatlab interface
fix compilation warning in clang 3.3
added 3d feel++ mesh :)
revert back to 2D
Merge branch 'feature/mesh' into develop