translation done

Author: Vladimir Kotal

intro.tex

@@ -35,7 +35,6 @@
 \item This is official material for the class \emph{Unix/Linux Programming in C}
 (NSWI015) lectured at the Faculty of Mathematics and Physics, Charles University
 in Prague.
-\item The text is currently being translated to English.
 \item This material is published under the
 \href{http://creativecommons.org/licenses/by-nc-sa/3.0/cz/}{Creative Commons
 BY-NC-SA 3.0} license and is always a work in progress, see the history on