Merge pull request #99 from HazyResearch/develop

Fixed several bugs in sampler & pipeline; refined logging
Merge pull request #100 from HazyResearch/develop

Added travis logo into README
Update logback.xml
Merge branch 'master' into develop
Merge branch 'develop'
Small fixes of spouse_example run script
Added simple `deepdive` Facade; MAKE BUILD to use it
- Be sure to `make build` or `make`, then your `deepdive` binary will be available at ~/local/bin.
- You still need to add sampler library path (see sampler docs).
- Now you can run deepdive without recompiling sbt project: `deepdive -c APP_HOME/application.conf`. Change your `run.sh` file.
- It is backward compatible.