Merge branch 'release'
Merge branch 'master' into arakiken
Emit DECDMAC sequence more faster (apply the patch written by @arakiken)
http://mlterm.sourceforge.net/img2sixel-fixhex.patch
Strip a pair of malloc/free
Merge branch 'feature-fast-DECDMAC' into feature-support-output-macro
Bump version
Merge branch 'feature-support-output-macro' into develop
Merge branch 'develop' into release-0.25
Merge branch 'release-0.25' into release