apply also updateEntitiesCoDimensionOnePermutation when nDim!=nRealDim
fix geotool cylinder (else connectivity problem between surface)
add doftable check in debug mode
add PointSet parameter with Pch,Pchv, Pdh (default is PointSetEquiSpaced ) :
    auto Xh = Pch<3,PointSetFekete>(mesh);
start update of expr eval based on loc+interp.  goal : use submeshrelation or conformal meshes
more tests+clean
fix compilation
First (raw) integration of the OneFeel student project into Feel++.
The project aims at interfacing Feel++ applications with Gmsh through OneLab.

Changes:
- Added onefeel.sh script used to configure the necessary OneLab files and launch Gmsh,
- Added --generate-ol option to Feel++ options,
- Added code to generate OneLab files from command-line options.

Fix:
- Removed duplicate entry in command-line options (gmsh.domain.recombine)

Known issue:
- Don't put commas in configuration entries, it messes up Gmsh OneLab parser for now.
add option to restart the RB construction from a given basis number : --crb.restart-from-N=10
add some minor functions
add function to delete a given number of elements in the RB (linked to the option crb.restart-from-N)
minor : clean
avoid warning regarding -1 not being uint
minor changes (see #252)
added struct for polynomial order change
added support for NED2_k (see #252)
Until RTk (see #251) is ready, support only order 1 NED2
Merge branch 'develop' of https://github.com/feelpp/feelpp into develop
up test_mortar
up test_mortar
update issue #36.
added test with two meshes sharing an interface 
compute mass matrices with respect to mortar test function set on one of the side