initial implementation of algorithm for #249

fix typo that put things in the wrong position

use int() builtin instead of POSIX::floor()

fix typo

use alternate method of creating local routines

remove aliases for new duplicate option

use coderefs for linear interpolate function, make binary insertion sort inline

add \n at end of die message regarding too many objects for print area

fix case where no duplication is done

fix whitespace according to slic3r coding style

assume 200x200 bed area if center is 0,0

Some cleanup to the autoarrange duplication logic

README.markdown

@@ -193,8 +193,9 @@ The author is Alessandro Ranellucci (me).
        Transform options:
         --scale             Factor for scaling input object (default: 1)
         --rotate            Rotation angle in degrees (0-360, default: 0)
-        --duplicate-x       Number of items along X axis (1+, default: 1)
-        --duplicate-y       Number of items along Y axis (1+, default: 1)
+        --duplicate         Number of items with auto-arrange (1+, default: 1)
+        --duplicate-x       Number of items along X axis for manual arrangement (1+, default: 1)
+        --duplicate-y       Number of items along Y axis for manual arrangement (1+, default: 1)
         --duplicate-distance Distance in mm between copies (default: 6)
     
        Miscellaneous options: