Toisto

Fixed

- Provide better error messages when the configuration file is not valid. Fixes [221](https://github.com/fniessink/toisto/issues/221).
- Make the instruction about clicking underlined words platform independent. Fixes [222](https://github.com/fniessink/toisto/issues/222).

Fixed

- Fix spelling error (comparative, not comparitive). Unfortunately, this means that progress on quizzes that ask to give the comparative degree is reset.
- Remove the unnecessary word 'form' from the instructions. Fixes [193](https://github.com/fniessink/toisto/issues/193).
- Don't assume that the readline module is installed on Windows.

Added

- Allow for specifying the target and source language in the configuration file. Note: because this change makes the target and source language parameters optional, this changes the command-line interface. You need to use: `toisto practice --target fi --source en` instead of `toisto practice fi en` when specifying the languages on the command-line.
- Allow for practicing a specific language level with `--level {level}`. Also allow for specifying the language level in the configuration file. Closes [186](https://github.com/fniessink/toisto/issues/186).
- Add quizzes for antonyms (opposites). Closes [7](https://github.com/fniessink/toisto/issues/7).
- Show the language level in the output of the topics command.
- More colorful help information.
- Health topic.

Fixed

- Also link labels to https://en.wiktionary.org/ when the user answered incorrectly. Closes [#169](https://github.com/fniessink/toisto/issues/169).

Added

- Allow for specifying different concept usage relations per language. Closes [163](https://github.com/fniessink/toisto/issues/163).
- If a newer version of Toisto is available, show it on startup. Closes [171](https://github.com/fniessink/toisto/issues/171).
- Add support for Linux and Windows. Closes [176](https://github.com/fniessink/toisto/issues/176).
- Add [Common European Framework of Reference for Languages (CEFR)](https://www.coe.int/en/web/common-european-framework-reference-languages) levels to concepts and use them as one of the factors to determine the order in which to quiz the user.
- Added "to dress" to the clothes topic.
- Add example sentences to the colors topic.

Fixed

- Fix the order of quizzes so that singulars are quizzed before plurals, present tense before past tense, etc.

Added

- Add affirmative and negative sentence types (polarity) and quizzes to change affirmative sentence into negative sentences and vice versa. Closes [82](https://github.com/fniessink/toisto/issues/82).
- Add topics for transport, languages, and adverbs.

Fixed

- Also show alternative answers if the user answers incorrectly.

Added

- Add past tense of verbs and quizzes to change past tense into present tense and vice versa.
- Add declarative and interrogative sentence types and quizzes to change declarative sentences into interrogative sentences and vice versa. Closes [140](https://github.com/fniessink/toisto/issues/140).
- Add a topic with interrogative pronouns (who, what, where, ...).
- Add links to https://en.wiktionary.org/ for alternative meanings as well.
- Add a command to show the contents of topics. Run `toisto topics -h` for more information.

Changed

- Changed the command-line interface to use subcommands, to prepare for more subcommands. Type `toisto -h` for more information.