Check required arguments
Merge branch 'segmentation' of github.com:rizar/groundhog-private into segmentation

Conflicts:
	experiments/rnnencdec/segment.py
Source sentences as a parameter
Merge branch 'segmentation' of github.com:rizar/groundhog-private into segmentation

Conflicts:
	experiments/rnnencdec/segment.py
Add two options

- start from scratch
- specify the source sentences