Reformatting for symposium format

Signed-off-by: helio <helio@roboken.esys.tsukuba.ac.jp>
Added motivation, purpose, simpler plots

Signed-off-by: helio <helio@roboken.esys.tsukuba.ac.jp>
Past presentation revisions

Signed-off-by: helio <helio@roboken.esys.tsukuba.ac.jp>
Summary plots

Signed-off-by: helio <helio@roboken.esys.tsukuba.ac.jp>