tao: remove trailing spaces from sources
more format cleanup of tao
update more tao code to modern PETSc, remove PETSC_NULL, some formating
tao: libtao -> libpetsctao [as gmake/cmake builds automatically add petsc prefix]
tao: remove OBJSC/OBJSF from makefiles
tao: fix LOCDIR in makefiles
tao: switch src makefiles form using tao/conf to petsc/conf
tao: move tao/src/* petsc/src/tao/
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