Fixed file permissions.

- Added semijoin and antijoin operators.

- Added README. ...

- Removed unnecessary File: line from Makefile initial comment.

- Moved all listings language specifications into their own subdirectory.

- Normalised the restrict, intersect and join macros. ...

- Refactored aggregate function macros into a single parameterised
  RelAaggregate macro.
- Fixed incorrect macro references in outer join macros.

- Added extend operator.

- Normalised the logical AND/OR macros.

- Changed TEXMF_LOCAL environment variable to TEXMFHOME, consistent with TeX ...

naming scheme.

- Added course handbook class.

- Created new common infrastructure for lecture documents across papers.

- Substituted monochrome version of new logo.

- Removed .png from OU logo install.

- Added bitmap versions of new OU logo.

- Added .jpg to OU logo install

- Removed obsolete versions of logo. ...

- Replaced old versions with new versions where applicable.

- Added bitmap versions of new OU logo.

- Updated package release date.

- Prefixed all macro names with "Rel" to avoid namespace clashes.

- Updated install paths to reflect beamer changes.

- Updated package date.

- Added \leftOuterJoin, \rightOuterJoin and \fullOuterJoin to make generating ...

them from XML easier.

- Moved NZCS beamer theme into shared repository.

- Renamed logical operators to \LogicalXXX because of conflict with \And, possibly defined in beamer?

- Added OU Logo files.

- Added relational algebra package.

- Added Makefile to make installing easier.

- Added file. ...

- Adds new keywords EXPORT and IMPORT.