work on resuspension_model=2
rewrote the sand-mud interaction part of the code
partial rewriting of the code, cleanup, and cha...
Merge branch 'master' of git://git.code.sf.net/...
Merge branch 'master' of git://git.code.sf.net/...
Merge branch 'master' of git://git.code.sf.net/...
Merge branch 'master' of git://git.code.sf.net/...
update of the iow-ergom model and inclusion of ...