add SWFArray structure to store temporary objects
explicitly destroy SWFFillStyle objects to avoid memory leak
update zlib to 1.2.8
update libpng to 1.6.2
add freetype 2.5.0
update libming to 0.4.5
update Makevars
browser cannot open html file with relative path
dev2swf() should return absolute path
copy swf file to the same directory of html file
write down NEWS for next release