added cg.sde.varyparam -- simulate from various parameter combinations and plot trajectories

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/colgem@29 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
updated solve.model.set.fgy to return global variable in cg.sde

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/colgem@30 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
added cg.sde.get.pseudodata to produce pseudo data sets under the model for various model parameters

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/colgem@31 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
forgot dir.name in cg.sde.get.pseudodata

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/colgem@32 edb9625f-4e0d-4859-8d74-9fd3b1da38cb