Tahoe Code SVN development

Changing the equation of stiffness.

G3 and H3 tangent operators implemented.

Changing the check for yield back.

G3 and H3implemented.

adding capability to output to file mr_rp_2d.info for debugging; also put limit on cohesion: c \ge \chi \tan\phi

Modifying the conditions to activate the local iteration. The yield function still needs to be checked.

Second derivative(shape functions) implementation debugged and checked.

some lines have been changed to calculate and check second derivative of shape function.

added code to "GetRotation" to ensure the matrix is orthogonal

added fiber mapping to an analytic surface (ellipsoid). This changed the
input syntax a bit but the devel. benchmarks have been adjusted accordingly.
Unfortunately some of the merged changes make the inflation benchmark I wanted
to add blow up...