Update installation instructions

README

@@ -46,6 +46,10 @@ EXAMPLES
 
 NOTES
    Installation:
+       Compile and install the C component:
+              make
+              make install
+
        Put something like this in your $HOME/.bashrc or $HOME/.zshrc:
 
               . /path/to/z.sh

z.1

@@ -57,6 +57,14 @@ NOTES
 .SS
 Installation:
 .P
+Compile and install the C component:
+.RS
+make
+.RE
+.RS
+make install
+.RE
+.P
 Put something like this in your \fB$HOME/.bashrc\fR or \fB$HOME/.zshrc\fR:
 .RS
 .P