Fixed that the start designs are really always considered as candidates.
Added documentation and warning to rcdMatrix. (The function now warns if the parameter looks like a cross-over design and not like a row-column design - the exact criterion is whether the number of different levels is <= the number of original treatments.)
Rd file for rcdMatrix.
Added the warning from rcdMatrix also to rcdMatrix_R. (See commit 488d477cb27b6533ec75dd117b14c10691b36353.)
Checking our model for the self-adjacency case.
New RUnit tests checking the warnings from rcdMatrix.
design.efficiency has not yet a model parameter (that's why the lines are still comments now).
Don't warn at the start of searching a matrix. It's okay that we start from a constant matrix.
Enable caching in vignette.
Removed unnecassary code.
Splitted 'randomDesign' into two functions (now also 'randomDesignWithoutCheck').