Add example illustrating PyLith+CATMIP

[baagaard-usgs]

Description

Create an example in strikeslip-2d illustrating how to use PyLith with CATMIP.

Parameters

• fault data file (slip impulses)
• Green's functions data file (displacement at sites)
• observations data file (target data)
• rake direction

CATMIP

• Implement simple HDF5 dataset reader (observations, Green's functions)
• Implement parameter reader
• Implement read_data()
• Fix configure (--enable-pylith)
• Implement sample_start()
• Implement get_model()
• Implement llk_start()
• Implement llk_update()
• Implement logistic calculations
• Implement Gaussian calculations
• Implement pylith_catmip_faultslip application
• Implement decomposition of slip into rake parallel and rake perpendicular components
• Add data data covariance as a user parameter (obs error and model prediction error, C_x = C_d + C_p, where C_p = alpha * D^2)

PyLith

• Add example step for conventional CATMIP algorithm
• Add example step for CF-CATMIP algorithm