improve cmake Finds modules: MKLROOT env var. is considered - env var. for libraries dir. are considered (ex: export HWLOC_DIR=/home/toto/install/hwloc)

set _DEP output variables even in PKG_CONFIG case - handle not required COMPONENTS (when OPTIONAL_COMPONENTS is used)

add cmake_modules in the project - this is a copy of morse_distrib directory - for dev in Finds --> use the centralized version in trunk/morse_distrib/ of the MORSE inria forge repository and set cmake var MORSE_DISTRIB_DIR

remove cmake_modules, they are located in trunk/morse_distrib and we have to give the path to it to configure with MORSE_DISTRIB_DIR, ex: MORSE_DISTRIB_DIR=~/morse/trunk/morse_distrib - this to avoid duplication of these cmake modules between projects (chameleon, pastix, maphys, scallfmm) - for releases the directory should be copied in the root of the project, ex: ~/chameleon-1.0/cmake_modules/

in MORSE_Desc_Create_User we can use the matrix in mat field without allocating it --> avoid to free it in this case, users could need it and will manage deallocation

avoid to compare to 1 when a simple if on the variable is enough --> was causing strange behaviors in FindSTARPU.cmake for example (without MPI, STARPU_starpu_mpi.h_INCLUDE_DIRS-NOTFOUND was appending in the list of STARPU_INCLUDE_DIRS even if mpi was not required)

change the way we include our own header files --> relative to the root - when plasma is in the same env, chameleon can take some headers not belonging to it (ex: #include descriptor.h, this file states in plasma install dir also) which make compilation errors

starpu_mpi_data_register is no longer a function but a macro in starpu-1.1, is replaced by starpu_mpi_data_register_comm

Avoid to add empty directories when checking a function in Finds - Fix errors in FindCHAMELEON.cmake