Updated readme

README.md

@@ -78,8 +78,9 @@ For full details simply run:
 
 ## What happens during the install...
 
-1. `expat` and `wget` are installed using `yum`. See below if you are
-using a system other than RedHat/CentOS/Fedora.
+1. `expat`, `wget`, `libxml2` and `libxml2-devel` are installed using
+`yum`. See below if you are using a system other than
+RedHat/CentOS/Fedora.
 
 2. CPAN is updated and the Module::Build module is installed. Other
 Perl dependencies are then installed using CPAN including Moose and
@@ -96,8 +97,9 @@ packages.
 ## I am not using *RedHat/CentOS/Fedora*. What do I do?
 
 The only requirement for RedHat-style Linux is for the yum
-installation tool. This is used only to install `expat` and `wget`. If
-you are using another Linux version, then install `expat` and `wget`
-using your package manager (e.g. `apt-get`) and comment out the line:
+installation tool. This is used only to install `expat`, `wget`,
+`libxml2` and `libxml2-devel`. If you are using another Linux version,
+then install these packages using your package manager
+(e.g. `apt-get`) and comment out the line:
 
-```sudo yum -y install expat wget```
+```sudo yum -y install expat wget libxml2 libxml2-devel```