Codekitlang

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- In progress...

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- Fix loading variable before normal html comment (by huubbouma)

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- User friendly error messages.
- Detect cyclic inclusion.
- Handle options for files are not found.
- Handle options for variables are not found.

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- Fixes Unicode Error on non-ASCII content.
- Update Documents.

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- Not Changed.
- Fixes typo in copying and MANIFEST

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- Not Changed.
- Fixes typo in classifiers.