Create test for Kuniri class.
app/core/kuniri.rb: Create the file and the skeleton of Kuniri.
spec/kuniri_spec.rb: Create the unit test for read_configuration_file.
spec/spec_helper.rb: Support file for kuniri_spec.rb
Implement method read_configuration_file
.gitignore: Update for ignore vim files and doc folder.
.travis.yml: Just add the file.
.yardopts: Add the yard configuration.
app/core/kuniri.rb: Implements read_configurationfile
app/error/configuration_file_error.rb: Add the error handling.
config/language/LanguageAvailable.rb: Add the configuration of languages.
spec/kuniri_spec.rb: Update test.
spec/spec_helper.rb: Update reference.
Keep the implementation of read_configuration_file