Removed load-into-hashbits from sandbox & ChangeLog

update. It is superseded by load-graph in scripts.
Merge branch 'master' of github.com:ged-lab/khmer into fix/load-into-hashbits

Conflicts:
	ChangeLog
Merge pull request #480 from ged-lab/fix/load-into-hashbits

Removed load-into-hashbits from sandbox & ChangeLog