created WavefrontObj class
create initializer
created create_point_identifier
created create_point_identifier
created create_face_identifier
created add_face
added syntax methods
created get_raw_data
use md5 for point and face identifiers
created gitignore file
created Gemfile
created export_obj_file
add initial testing
remove verbose variable
added test for point adding
added tests for checking default definitions by initializer
added tests to check the point format
changed some test descriptions
added test for face adding
added face test to check if a double adding is prevented