Changes in vardpoor version 2.9
  
    + Add function min_count, min_size, MoE_Y, MoE_P

Changes in vardpoor version 2.8
   
    + Corrected calculation in prop_dom_optimal_allocation

Changes in vardpoor version 2.7
   
    + Corrected calculation in prop_dom_optimal_allocation

Changes in vardpoor version 2.6
   
    + Update some descriptions

Changes in vardpoor version 2.4
   
    + Bug correction in functiom dom_optimal_allocation.

Changes in vardpoor version 2.2
   
    + Made faster functiom dom_optimal_allocation.

Changes in vardpoor version 2.0
   
    + Corrected bug in function expvar.