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Changes in version 0.6

- Fixed a bug in EzmlmArchive.month.
- Added new built-in functions for producing relative links in the
  templates: relink and cmdlink.
- Rewrote the templates to merge all the common header and footer data
  into a single file.
- Added a parse tree optimizer to the template system which removes body
  elements consisting of a single node.
- Pre-compile all template expressions before use to speed up looped
  execution.
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Changes in version 0.5

- Totally rebuild the template system, moving most of the actual
  page-specific code into the template pages themselves.
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Changes in version 0.2

- Added proper targets to build the compiled Python bytecode files.

- Replaced the Python main routine with a C wrapper that is suitable for
  installations where setuid operation is required.
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