Refactor template files (contributed by Velimir from LaTexTemplates.com)

- remove 'import' package
- change comment style
- delete unused file(cvletter.tex)

examples/cv/presentation.tex

@@ -1,23 +1,37 @@
+%-------------------------------------------------------------------------------
+%	SECTION TITLE
+%-------------------------------------------------------------------------------
 \cvsection{Presentation}
+
+
+%-------------------------------------------------------------------------------
+%	CONTENT
+%-------------------------------------------------------------------------------
 \begin{cventries}
+
+%---------------------------------------------------------
   \cventry
-    {Presenter for <DEFCON 20th : The way to go to Las Vegas>}
-    {6th CodeEngn (Reverse Engineering Conference)}
-    {Seoul, S.Korea}
-    {Jul. 2012}
+    {Presenter for <DEFCON 20th : The way to go to Las Vegas>} % Role
+    {6th CodeEngn (Reverse Engineering Conference)} % Event
+    {Seoul, S.Korea} % Location
+    {Jul. 2012} % Date(s)
     {
-      \begin{cvitems}
+      \begin{cvitems} % Description(s)
         \item {Introduced CTF(Capture the Flag) hacking competition and advanced techniques and strategy for CTF}
       \end{cvitems}
     }
+
+%---------------------------------------------------------
   \cventry
-    {Presenter for <Metasploit 101>}
-    {6th Hacking Camp - S.Korea}
-    {S.Korea}
-    {Sep. 2012}
+    {Presenter for <Metasploit 101>} % Role
+    {6th Hacking Camp - S.Korea} % Event
+    {S.Korea} % Location
+    {Sep. 2012} % Date(s)
     {
-      \begin{cvitems}
+      \begin{cvitems} % Description(s)
         \item {Introduced basic procedure for penetration testing and how to use Metasploit}
       \end{cvitems}
     }
+
+%---------------------------------------------------------
 \end{cventries}