update README
add spec for Chunk#stretch
improve error message
version bump to 0.1.0
fix argument for Mp3Info
fix specs
version bump to 0.1.1
improve error handling
force to set sample rate to 44100 to avoid sample rate mismatch
version bunp to 0.1.2
use streamio-ffmpeg
add Scissor::Chunk.new_from_url
version bump tp 0.2.0
Scissor::Chunk#loop is not destructive
version bump tp 0.2.1
update README
improve Scissor::Chunk#fill
version bump tp 0.2.2
rename Scissor::Chunk to Scissor::Tape
version bump to 0.2.3