changed build instructions for building zorba on windows. A single var  is sufficient to specify the boost include and lib dir.
changed build instructions for building zorba on windows. A single var 
is sufficient to specify the boost include and lib dir.

28msec/zorba,cezarfx/zorba,28msec/zorba,bgarrels/zorba,28msec/zorba,28msec/zorba,bgarrels/zorba,28msec/zorba,cezarfx/zorba,cezarfx/zorba,cezarfx/zorba,28msec/zorba,bgarrels/zorba,bgarrels/zorba,bgarrels/zorba,28msec/zorba,bgarrels/zorba,28msec/zorba,bgarrels/zorba,cezarfx/zorba,cezarfx/zorba,28msec/zorba,bgarrels/zorba,cezarfx/zorba,cezarfx/zorba,cezarfx/zorba,cezarfx/zorba