Merge pull request #92 from Nanosim-LIG/opencl

Fix OpenCL submodules and translate section from the manual
added the two suggestions made by Elliott
Merge pull request #93 from komatits/devel

added the two suggestions made by Elliott
fixed a compilation problem introduced by Kevin Pouget's OpenCL modification: the solver did not compile without GPUs any more.
My modification works fine for CPUs, regarding GPUs I am not sure (I am not familiar enough with how the Makefile works for GPU routines)
Merge pull request #94 from komatits/devel

fixed a compilation problem introduced by Kevin Pouget's OpenCL modifica...
updated some comments
Merge pull request #95 from komatits/devel

updated some comments
tried to use the same notations in model_crust_1_0.f90 and model_crust_2_0.f90;
also cleaned useless white spaces in all source files using a script
Merge pull request #96 from komatits/devel

tried to use the same notations in model_crust_1_0.f90 and model_crust_2...
renamed INCLUDE_SEDIMENTS_CRUST to INCLUDE_SEDIMENTS_IN_CRUST
Merge pull request #97 from komatits/devel

renamed INCLUDE_SEDIMENTS_CRUST to INCLUDE_SEDIMENTS_IN_CRUST
made source code of model_crust_2_0.f90 closer to that of model_crust_1_0.f90
Merge pull request #98 from komatits/devel

made source code of model_crust_2_0.f90 closer to that of model_crust_1_...
improved a comment
Merge pull request #99 from komatits/devel

improved a comment
added support (off by default) for the ice layer in crustal models model_crust_1_0.f90 and model_crust_2_0.f90
Merge pull request #100 from komatits/devel

added support (off by default) for the ice layer in crustal models model...
got rid of MAXIMUM_HEIGHT_TOPO and MAXIMUM_DEPTH_BATHY, which had become useless
Merge pull request #101 from komatits/devel

got rid of MAXIMUM_HEIGHT_TOPO and MAXIMUM_DEPTH_BATHY, which had become...
start working on better OCL cleanups