Set development version to 0.4-SNAPSHOT
Set target JVM to 1.7

- closes #8
Avoid concurrent access to deletion state
Read highest sequence number directly from topic partition
Close consumer connection when reading metadata

- re #9
Close producer connection after saving snapshot

- re #9
Ignore orphan snapshots

- fixes #7
- more efficient snapshot loading for criteria != Latest
Set release version to 0.3.1
Merge branch 'master' into r-0.3
Set release version to 0.3.1