This commit removes the possibility to construct BidiParagraph and
BidiLine objects with non-zero offsets. We don't use these features,
and the assumption that these offsets are always zero simplifies our
visual ordering algorithm.
This commit implements fix for an issue where mixed punctuation can be rendered in the wrong order.
A regression test has been added to catch this in the future.
This commit encapsulates the following:
* Removal of public Unicode classes.
* Move to new 'blob' generated data format.
* Fix issue where numerical characters would be assigned incorrect bidirectional levels, resulting in them rendering in the wrong order.
* Adds a unit test for the number ordering issue.
* Refactor of Bidirectional and Line breaking algorithms.
