Adjusting Margins for Multicolumn and Unicolumn Output

An extension to the multicol package for changing margins for
multicolumn layout and one column output


Changes:

   v1.1  Changed calculations for unicolumn layout
         which might previously lead to loss of text

   v1.2  Bug fix: now adjmulticols works inside a box too.

   v1.3  Big fix: disappearing material in one column output

   v1.4  New version of bug fix with one column

   v1.5  Added space after one column material