Release 0.7.1

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[fix] do not throw exception when initializing HoodieError without passing a message

fixes #270

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This commit was sponsored by The Hoodie Firm.
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build

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This commit was sponsored by The Hoodie Firm.
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build

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This commit was sponsored by The Hoodie Firm.
You can hire The Hoodie Firm:
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build

* * *

This commit was sponsored by The Hoodie Firm.
You can hire The Hoodie Firm:
http://go.hood.ie/thehoodiefirm
build

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This commit was sponsored by The Hoodie Firm.
You can hire The Hoodie Firm:
http://go.hood.ie/thehoodiefirm