A method of box_t consume_space is renamed
optimal_rect_for_expand is changed to work properly
Increase test sample.
make sample data input/output 1.sample turns to be passed
add parameter to determine test with rotate to rect_t::containable()
add second sample data
Modify # of boxes
Change packed box list to have sequential order.
test sample 3 added
types of free_space_t and unpacked_list_t are changed.
set/multiset has problem with sorting..
test template for makefile is added
Some more samples are added
Add routine to divide free space and gather remains