Added support for OpenMP in skeleton()

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/pcalg@263 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Merged trunk to dev branch

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/pcalg@264 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Improved validity checks for classes used for GIES

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/pcalg@265 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Corrected bug with stepwise execution of causal inference algorithms

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/pcalg@266 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Merged trunk to dev branch

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/pcalg@267 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Removed dev-backup branch

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/pcalg@268 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Added support for OpenMP to PC and (R)FCI

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/pcalg@269 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Added fciPlus with doku and tests; increased flexibility of udag2pag and udag2pdagRelaxed

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/pcalg@270 edb9625f-4e0d-4859-8d74-9fd3b1da38cb