Learning Swedish

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Added following new exercises:
3.04 Question words 2
3.12 Vocabulary practice
3.13 Vocabulary practice
4.03 Vocabulary practice
4.04 Vocabulary practice
4.05 Vocabulary practice
5.02 Personal pronouns 1
5.13 Word order in questions 2
5.14 Vocabulary practice
6.12 Vocabulary practice
6.13 Vocabulary practice

Added wordlist for exercise 3.04

Minor wordlist changes