Added paragraph explaininng the text/binary flavors of some methods,
to make it easier for people to find what they're looking for.
diff --git a/Doc/lib/libftplib.tex b/Doc/lib/libftplib.tex
index 4014052..4a5f98c 100644
--- a/Doc/lib/libftplib.tex
+++ b/Doc/lib/libftplib.tex
@@ -83,6 +83,11 @@
\subsection{FTP Objects \label{ftp-objects}}
+Several methods are available in two flavors: one for handling text
+files and another for binary files. These are named for the command
+which is used followed by \samp{lines} for the text version or
+\samp{binary} for the binary version.
+
\class{FTP} instances have the following methods:
\begin{methoddesc}{set_debuglevel}{level}