remove reader
remove unnecessary block
rewrite Worker to ensure that all data is written
1.8.7 doesn't have String#clear
Merge branch 'master' of github.com:propublica/daybreak
read the file as a whole
Merge branch 'master' of github.com:propublica/daybreak
remove locking
don't need many types of locks anymore
v0.1.3
Merge branch 'master' into gh-pages