add platformer legnth

some improvements

-  do not throw exception if file is empty
- DataPlist should initialized before save
- fallback for empty input in level decompress
- rollback base64 lib to 0.1.2

fix publish pipeline

sometimes there is name is not defined

add hsv values for block #35

add missing fields for edit song trigger

fix volume level in sfx triggers

add SfxTrigger

rename LevelLength to Duration

Merge pull request #29 from flightlex/master

gd options and other (check desc)