v2.7.1.
Fixed #flatten bug.
Added #flatten test.
fixed .* files..
On branch master
modified:   .gitignore
modified:   .npmignore
modified:   .travis.yml
modified:   lib/bolgia.js
modified:   package.json
new file:   test/flatten-simple-test.js
modified:   test/run.sh
modified:   test/toString-test.js