reduce memory requirements to run tests
Merge pull request #706 from ged-lab/update/streaming

Two minor bug fixes to sandbox scripts
minor refactor of calc-error-profile
Merge branch 'master' of github.com:ged-lab/khmer into update/streaming
Merge pull request #701 from ged-lab/fix/tests-nohighmem

reduce memory requirements to run tests
Merge branch 'master' of github.com:ged-lab/khmer into update/streaming
make numerical arguments into floats for better specifying large numbers