Changeset 954 for codes/icosagcm/trunk/src/vertical

trunk : Added metric terms to kernels parameters to avoid Host/GPU transferts

Metric terms are now subroutine parameters instead of module variables in kernel subroutines. Dummy arguments for metric terms are now defined as fixed-size arrays, and arrays dimensions are well known when entering an 'acc data' region. Array descriptors are no longer transferred form host to device each time the data region is executed.