modify mpi ctest and add an mpi job in gitlab-ci

See merge request !7

Modify the interface of the tpgqrt routines, and fix some numerical bug within the routine

See merge request !8

Add a testing for the QR factorization of two square matrices on top of each other, and the associated generation of the Q that is required in QDWH

Change tpgqrt interface because ungqr already includes laset, so it can not be used as a two steps algorithms

bug fix to include include/chameleon_config.h earlier

See merge request !10

build two configurations with starpu: w/ and w/o mpi component enabled

Config/definitions

See merge request !6

- create config files to store definitions
 - include/chameleon_config.h: definitions exposed to the public (installed file)
 - control/config.h: additional definitions used internally
- modify source code to call the config files when it is necessary (when the different "if defined" are used)

Missing CUDA kernels, and fix many warnings

@all 
- Add missing herfb and tpmqt CUDA kernels
 - Silent all warnings in Debug with gcc 5.4
 - Replace max/min macros with static inline functions to avoid warnings about comparing unsigned/signed int and or int sizes.

@sylvand : can you tell me if you still have trouble when compiling with StarPU ? I hope, I removed every probems.

See merge request !5

  - pipeline build and test in one job
  - limit ctests to test_shm_s (testing, shared memory, simple precision) to reduce the testing time

Gs/dev

Correction to CMakeLists.txt issue #7 + comments + error handling

NB: my first merge request ! -> comments/remarks welcome

See merge request !4

NOTE: morse_geteltaddr() seems to be not used anywhere, maybe remove it ?

Add ztpqrt, and ztpgqrt functions

@all 
Add a tile level tpqrt function and a tpgqrt function to gnerate the associated Q. Used by QDWH algorithm.

See merge request !3