Update Readme.md
Merge branch 'master' of https://github.com/tusharmath/Multi-threaded-downloader

Conflicts:
	README.md
release 0.2.6
Some files were left while committing
release 0.2.7
fix #26
fix #25 thread callback is only called when end request is made
fix #25 earlier fix did not work effectively
adding npm test
adding travis.yml
Adding Travis Build Status
release 0.2.8
Long lost changes