Ftw.pdfgenerator

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- Implement URL converter for supporting hyphenation in URLs. [jone]

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- Listing converter: avoid using beatiful soup. [jone]

- Fix recursive subconverter locking problem. [jone]

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- Added footnote subconverter.
[lknoepfel]

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- Don't add rows where not all cells are headcells to the tablehead.
[tschanzt]

- Fix table converting when there are less cells than specified and no colspan attribute is given.
[tschanzt]

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- Fix table converting error when there are more ``<col>`` tags than cells.
[jone]

- HTML converter: fix leading quote when at beginning of string.
[jone]

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- Workaround for too long makeindex argument causing buffer overflow.
[jone]