* Run codecov only once * Update .travis.yml * Update .travis.yml * Add os based install to Makefile * Add requests like .travis.yml and Makefile * Add 'sudo: required' to .travis.yml * Add before_install * Make separate command
* add tests for repr * remove repr for Cell * add round for repr of Cell * change decimal places to 2 * change tests for 2 decimal places
* add .vscode * add tests for UsageError * fix pep8