New help file for language editing

lang/en/help/langedit.html

@@ -0,0 +1,12 @@
+<P ALIGN=CENTER><B>Language Editing</B></P>
+
+<P>To edit languages on this page the files need to be writable 
+   by the web server process.
+
+<P>Within some of the strings you will notice <B>$a</B> and <B>$a->something</B>.
+
+<P>These represent variables that will be replaced by names or other words from 
+   within Moodle.  
+
+<P>When there is only one variable, the $a form is used.  When there are two or 
+   more variables, then each one has a name.