ALLOCATABLE arrays in NPROMA routines

[mlange05]

This issue was originally raised by @pmarguinaud in GPU adaptation additions. It pertains to the "Guidelines and recommendations" section. The original in-line comment was:

 * Large arrays should be declared as allocatable, to avoid excessive stack usage.                                                                                                                                                 
   Small arrays, and in particular those declared in tight code (this should be avoided wherever                                                                                                                                   
   possible!) should be automatic, to benefit from faster stack handling.                                                                                                                                                          
                                                                                                                                                                                                                                   
 >>PM: definition of large and small arrays ? I recommand banning ALLOCATABLEs in all NPROMA routines                                                                                                                              
 (ie those which process a single NPROMA block).<<