Fix LzoTextLine
Add support for AppJar in Config
Use externalizer in BijectedSourceSink
make merge return Unit, explain mergeMisc in comment
rename merge -> mergeFrom, refactor out 'heads'
Merge pull request #926 from twitter/jco/bijsourcesink_ext

Use externalizer in BijectedSourceSink
delete broken `toList`
add TODO's for `toList` and `dump`
add TODO for handling checkpoints
Merge develop
Merge pull request #921 from twitter/jco/textline

Fix LzoTextLine as a TypedSource
Add tests
Merge pull request #924 from twitter/config-appjar-support

Add support for AppJar in Config
Merge pull request #918 from bholt/repl

Snapshot a pipe in the REPL
started trying to use Execution for 'run'