Add automatic generated fortran support for setting and returning contexts

Major cleanup of the code for setting and returning application (previously called user) contexts
- PetscCtx ctx is now t

Add automatic generated fortran support for setting and returning contexts

Major cleanup of the code for setting and returning application (previously called user) contexts
- PetscCtx ctx is now the standard for passing in contexts
- PetscCtxRt ctx is the standard for passing out contexts, including context destroy routines based on PetscCtxDestroyFn

Both of these are typedef to void*

Also removed most use of user and userctx for context arguments now consistently named ctx

Improved documentation on PetscCtx and PetscCtxRt and on how to use contexts (including getting them) from Fortran

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ts(pseudo): Grab and use fnorm from ComputeFunction

Mostly to make it more clear why this function is being called where it
is.

ts(pseudo): Use PetscCallBack() for adapt functions

ts(pseudo): Reuse Function evaluation even for IFunction

Previous implementation recomputed the IFunction everytime even if the
result was already available.

ts(pseudo): Remove update Vec

This means that every use of `TSPseudoGetSteadyResidual()` gets the
`ts->vec_sol` Vec and so the Xstate is consistent.

ts(pseudo): Remove TSPseudoComputeTimeStep() and TSPseudoVerifyTimeStep()

ts(pseudo): Remove unused `TSPseudoVerifyTimeStepDefault()`

ts(pseudo): Update TSPseudo to standard while loop

This also fixes behavior where, on SNES failure, the step repeats
without changing the simulation (i.e. it ignores the
TS_DIVERGED_NONLINEAR_SOLVE

ts(pseudo): Update TSPseudo to standard while loop

This also fixes behavior where, on SNES failure, the step repeats
without changing the simulation (i.e. it ignores the
TS_DIVERGED_NONLINEAR_SOLVE set by TSAdaptCheckStage()).

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ts(pseudo): Add TSPseudoComputeFunction()

ts(pseudo): Move to TSAdapt-based timestepping

checkbadSource: enforce proper style in makefiles

TSPSEUDO: update needs to be copied inside the loop

Use Vec API to compute xdot
Remove redundant computation of xdot in Jacobian

Avoid duplicate TSComputeIFunction() computation when possible in TSStep_Pseudo()

Improve the performance of TSPseudo by removing unneeded recalculations of the same function

Reported-by: aldo.bonfiglioli@unibas.it

This first commit removes the recalculation of the norm of F(u_f

Improve the performance of TSPseudo by removing unneeded recalculations of the same function

Reported-by: aldo.bonfiglioli@unibas.it

This first commit removes the recalculation of the norm of F(u_final) from the previous SNESSolve

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