ohai

This PR introduces gcov to show a coverage. This PR also introduces coveralls.io to show the history of coverages. To use coveralls, please do as follows: - Sign up to...

This PR enables you to run specs on travis-ci. This PR is followed by #30 .

This change is the preparation for using travis-ci to run specs. Applying this PR, you must use "rake compile" and "rake spec" to run specs.

A refactoring of ndoop.c.