TSARKIMEXSetFullyImplicit() was marked not to generate a Fortran stub

Reported-by: nirmal rai <nirmalr18@gmail.com>

fix violations of PETSc style guide: Usage of SETERRQ and NULL

Merge branch 'maint'

TS: Remove call to SNESSetFromOptions() in subtypes

Bug-fix: Need a check here in TSARKIMEX when events are not set up.

Identified by PR #372.

Fix TSARKIMEX to work with TSEvent

arkimex was broken when using TSEvent because whenever an event was located and the step rolled back arkimex would
think that it needs to reinitialize since the so

Fix TSARKIMEX to work with TSEvent

arkimex was broken when using TSEvent because whenever an event was located and the step rolled back arkimex would
think that it needs to reinitialize since the solution vector has changed. Fixed this issue by adding a check for
the status of the event flag. Whenever the flag TSEVENT_PROCESSING is set, denoting the event is being processed, arkimex
will not try to reinitialize.

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strip whitespaces

fix compile warnings

Generate an error message when trying to overwrite default options of CN and BEULER

fix the option overwriting issue for Theta method

initial locks with concurrencykit and OpenMP

cleanup of many monitors that used nonthread safe constructors when no viewer passed in

cleanup of examples that generated unused variable messages when

initial locks with concurrencykit and OpenMP

cleanup of many monitors that used nonthread safe constructors when no viewer passed in

cleanup of examples that generated unused variable messages when compiled with --with-log=0

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fix compile warnings

Generate an error message when trying to overwrite default options of CN and BEULER

fix the option overwriting issue for Theta method

fix the bug in the endpoint version of discrete adjoint theta and correct the affected example outputs

Merge branch 'emil/fix-ts-dae-rebased-v3'

fix a costintegral bug in rk adjoint

Merge branch 'hongzh/add-costintegral-ts-rk-adjoint'

fix a bug in cost integral evaluation for explicit solvers

fix ts theta

add costintegral to rk

Merge branch 'hongzh/evaluate-cost-integral-in-fwd'

PetscHeaderCreate: Shorten argument list and optimize memory allocation

* Remove type arguments from the macro
* Use a single memory allocation call instead of three

fixed missing CHKERRQ() detected by clang's --analyze

updated PETSc directory layout to match standard packaging strategies

include/petsc finclude,private,mpiuni
lib/petsc conf
bin/petsc*