added sandbox/slice-reads-by-coverage.py
added collect-reads for streaming subsampling
Merge branch 'master' of github.com:ged-lab/khmer into feature/collect_reads
updated ChangeLog re collect-reads and slice-reads-by-coverage
first pass removal of old sandbox files
more triage; recovered graph-size
more triage
first round triage on sandbox/, done
added bigcount option to collect-reads
fixed docstring/help text in collect-reads
Merge branch 'master' of github.com:ged-lab/khmer into feature/collect_reads

Conflicts:
	ChangeLog
updated collect-reads to use running average, not average of last 1000, as per @mr-c
pylint fixes
included explicit links to removed files
removed unnecessary verbatim tag
catch exception raised by reads shorter than k
fixed normalize-by-align for graphalign mrc-additions
Merge pull request #590 from ged-lab/update/normalize-by-align

fixed normalize-by-align for graphalign mrc-additions
Merge branch 'master' of github.com:ged-lab/khmer into cleanup/sandbox
documented files removed from sandbox