remove .ds store file
added disqus comments and github editing
Added khmer handbook to list of blog posts.
Fix README to indicate proper testing instructions for the time being.
Fix nasty memory leak in partitioning code.
Add virtual memory debugging support on Linux for partitioning code.
Remove redundant, overriden implementation of '_make_graph' in script tester.
Provide debug versions of '_make_graph' and 'runscript' in script tester.
Detect uniformly-zero abundance distributions to avoid divide-by-zero problems.
Merge remote-tracking branch 'ged/master'
merged ctb/master and ged/master