minor directory reorganization

src/doc/Braun_et_al_2008.pdf

src/doc/DOUAR_manual.pdf

src/doc/build-p690

src/doc/changes-made

src/doc/compile-issues

src/doc/report-01

src/doc/report-02

src/p690/build-problems

src/test/douar.run.mahone

src/test/douar.run.p690

src/test/douar.run.sopalepc

src/test/douar_stdout.txt

src/test/input.txt

src/test/input_2009-07-10.txt

src/test/input_DT065.txt

src/test/input_vM_lvl5.txt

src/test/stdout_grace_2009-07-10.txt

src/test/stdout_vM_lvl5.txt