Various issues #119
Description
- - plotting.ffi: enable support of 3d distslip for seismic only setups
- - Initialisation of chains on Cluster crazy slow- likely data io issue from login node to compute node-resolved with THEANO_FLAGS
- - lsq should not be recomputed when restarting FFI with stage_number larger than 0
- - add hyper sampling for PolarityComposite