* README: Added ebib dependency

README

@@ -29,28 +29,32 @@ relevant calculations, and generating the referenced figures.
 4. Your R installation must include the ggplot2 package,
    http://had.co.nz/ggplot2/
 
-5. Emacs Speaks Statistics (ESS) provides support for communication
+5. The ability to jump to bibliographic entries from citations in the
+   Org-mode file depends on ebib, http://ebib.sourceforge.net/
+
+6. Emacs Speaks Statistics (ESS) provides support for communication
    between Emacs and a persistent R process. To install ESS download
    the source code from http://ess.r-project.org/ -- this paper was
    tested with version 5.13.  Unpack the download into a directory on
    your machine, and update the `ess-path' variable on the second line
    of init.el in this directory to point to your local ess/lisp/
    directory.
 
-6. Alternatively, follow steps 6 through 9 or call make from within
-   the directory that holds colonization.org.
+7. Alternatively, follow steps 8 through 11 or call make from within
+   the directory that holds colonization.org.  The make program will
+   create the file colonization.pdf.
 
-7. From the command line, cd into the directory that holds colonization.org
+8. From the command line, cd into the directory that holds colonization.org
    and then launch Emacs using the following command
 
    : emacs -Q -l init.el colonization.org
 
-8. The resulting Emacs window will be visiting the Org-mode file,
+9. The resulting Emacs window will be visiting the Org-mode file,
    colonization.org.  From here it is possible to navigate and edit the
    document, and to inspect and evaluate source code blocks.
 
-9. Export the document to LaTeX with the M-x org-export-as-latex
+10. Export the document to LaTeX with the M-x org-export-as-latex
    command---just press RET in reply to queries from R.
 
-10. The resulting colonization.tex file can be built from the command line
+11. The resulting colonization.tex file can be built from the command line
    with pdflatex and bibtex.