* Rev 3.2 Added max.row, min.row, min.col to complement base max.col. Added dirdir, variant of dir which returns only directories. Removed lsdim in favor of new "overload" dim function,which should have been put into baseR long ago. dim  is happy to return length() when the input is a vector or other object without a dimension attribute, and dim() otherwise. Added findpat() which looks (a bit slowly) for patterns inside data items. Added polyInt(), a Q&D tool to test whether two polygons (in a plane) intersect. Added binit(), world's cheapest data-binning tool.
* Rev3.0.1 functions unchanged; DESCRIPTION and NAMESPACE files updated to current CRAN standards
*pushdpopd.R: Rev3.0 modified so directory stack is saved in separate environment, so doesnt violate CRAN no <<- rule. 
*added  lsdim.R , which returns dim(objects) or length(objects) for vectors, no guessing required.