Removes title and description from Asset calls

[floriank]

I originally assumed these are required fields, but they are not.

Thanks @OldhamMade for reporting the issue.

Fixes #37

[coveralls]

Pull Request Test Coverage Report for Build a601c48612266f457be51704aa7a6a271f1bbdc4-PR-43

• 2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.6%) to 68.224%

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Totals
Change from base Build a9cc93b50e802be0512412f0677ad22d4ef07449:	0.6%
Covered Lines:	73
Relevant Lines:	107

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💛 - Coveralls