- Added documentation on alternative uses of the SLIDES, etc., variables.

- Removed obsolete OmniGraffle references.

- Removed obsolete prerequisites.

- Updated makefiles for new common infrastructure.

- Added paper and chapter variables files to prerequisites.

- Fixed combined prerequisite variable names (d'oh!)

- Fixed figures prerequisite (put in FIG_IMAGES instead of FIG_FILES). ...

- Added variables for combined document prerequisites.

- Added infrastructure files for figures and fixed slides variable.

- Added default spec for shared infrastructure files.

- Added INSTALL variables.

- Added default vpath for .pict.

- Added .svg to list of standard suffixes.

- Added support for Inkscape SVG files.

- Moved .aux files from TIDY_FILES to CLEAN_FILES.

- Added SLIDE_FILES and FIG_FILES variables for miscellaneous dependencies. ...

- Added default rules for {.png,.jpg} -> .graffle and .pict -> .png.

- Updated the list of standard suffixes as well.

- Updated list of standard vpaths.

- Split apart custom rules and variables.

- Changed order of centralised rule loading.

- Deleted a couple of rogue vpaths that crept in.

- Revamped flow of control considerably because it wasn't working (appears to ...

be a problem with the order in which variables are defined).

- Added centralised makefiles for lectures.