Merge pull request #89 from Nanosim-LIG/opencl

add OpenCL support to SPECFEM3D_GLOBE
switched back to the right version of DATA (it seems Kevin Pouget's commit of the OpenCL modifications had changed it to an older version)
Merge pull request #90 from komatits/devel

switched back to the right version of DATA (it seems Kevin Pouget's comm...
added Kevin Pouget's description of the new OpenCL routines to the manual
Merge pull request #91 from komatits/devel

added Kevin Pouget's description of the new OpenCL routines to the manua...
Merge branch 'devel' of https://github.com/geodynamics/specfem3d_globe into opencl
translate OpenCL note in English and regenerate the PDF