Implement first version of Python bindings for `imap-codec`

[HenningHolmDE]

First draft of Python bindings for imap-codec.

• [x] implement decode functions
• [ ] implement encode functions
• [x] rethink exception types (differentiation between error types)

This aims for a first implementation to provide a "usable" API from Python through dict objects, a more Pythonic API (using explicit types) can be achieved lateron.

I'm open for suggenstions on how to do things differently.

[coveralls]

Pull Request Test Coverage Report for Build 9645169959

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 92.678%

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Totals
Change from base Build 9634738796:	0.0%
Covered Lines:	10190
Relevant Lines:	10995

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💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 9669612084

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 92.678%

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Totals
Change from base Build 9658279125:	0.0%
Covered Lines:	10190
Relevant Lines:	10995

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💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 9669683508

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 92.678%

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Totals
Change from base Build 9658279125:	0.0%
Covered Lines:	10190
Relevant Lines:	10995

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💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 9700099017

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 92.678%

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Totals
Change from base Build 9658279125:	0.0%
Covered Lines:	10190
Relevant Lines:	10995

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💛 - Coveralls