Add development library
Update Rakefile to run RSpec as default
Update specs by Transpec
Refactor specs
Refactor #extract_filename
Add ramesh_spec.rb
Refactor spec of #get_mesh_indexes
Refactor spec of #validate_minutes
Raise DownloadError
Modify spec_helper
Remove "when" from context description
Disable net connection in test
Add .travis.yml
Setup Coveralls