Add dependencies to README

README.md

@@ -2,6 +2,19 @@
 
 Two haskell lectures: introduction and higher order functions.
 
+### Dependencies
+
+Under gentoo, you need:
+* dev-tex/latex-beamer
+* dev-tex/pgf
+* dev-tex/xcolor
+* dev-texlive/texlive-basic
+* dev-texlive/texlive-humanities
+* dev-texlive/texlive-latex
+* dev-texlive/texlive-latexextra
+* dev-texlive/texlive-latexrecommended
+* dev-texlive/texlive-xetex
+
 ### Building
 
 To build the pdf files (both beamer and article):