Merge branch 'feature/issue94' into 'master'

Feature/issue94

* The API of Lapack_to_Tile/Tile_to_Lapack family function is modified to integrate the uplo parameter (This is done to enable the following points)
* A new option `mtxfmt` is introduced to change the allocation of the matrix.
  * 0: The matrices are allocated as a single big allocation
  * 1: The matrices are allocated tile by tile (Only with StarPU)
  * 2: The matrices are out-of-core (Only with StarPU)
* Fix issue #96 by adding an example at the end of the usage function
* Fix an issue with the descriptor copy functions that was using the incorrect get_blkldd/get_blkaddr functions.


See merge request !199