+ forder now handles type character, with radix sort of unique strings
+ Dependency bumped to R 2.14.0 (now over 2 years old)

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/datatable@1106 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
fastorder.c renamed forder.c for consistency

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/datatable@1107 edb9625f-4e0d-4859-8d74-9fd3b1da38cb