Remove comment
Move ZopfliInitOptions to util.c to allow excluding gzip and zlib linkage
More options for Zopfli binary
Small cleanup
Improved directory structure with the source code under src
Fix tree encoding to save more bits
Fix tree encoding to save more bits
ZopfliPNG
remove usage of nonstandard getline
Moved initialization of ZopfliBlockState and cache to the caller
Option to limit number of iterations by CPU time
Per-block iteration time limit