The Dosis font has only partial support for Romanian characters

The Romanian alphabet has the following special characters: `Ăă Ââ Îî Șș Țț`. Very often, the characters `Șș` and `Țț` are misrepresented using the characters `Şş` and `Ţţ`. The Dosis font supports all Romanian characters, except for `Țț`. It does, however, support `Ţţ` (and also `Şş`). If @impallari or one of the other authors could just add a mapping from the `Țț` characters to the glyphs already in use for `Ţţ`, the font would fully support Romanian characters.