Tahoe Code SVN development

Modifying elementmatrix of lhs from from kSymmetric to kNonSymmetric, and ignoring the lines to calculate Jacobian.

Modifying elementmatrix of lhs and lhs_disp from kNonSymmetric to kSymmetric. However, the problem in the code is still existing.

Modifying the LHSDriver. However, the problem in the code is still existing.

Modifying the RHSDriver and the LHSDriver. However, the problem in the code is still existing.

commented out some functions; still not converging

adding functions to attempt to do initialization for dynamic integration

Adding the rotation part in this code. However, there is a problem to run the code.

Rearranging formulation to solve for acceleration instead of displacement for compatibility with the nonlinear solver.

fluid mass density and total mass density were implemented.
All other implementations were checked.

All of the matrices were implemented.