Added html escaping script using C-h

vim/plugin/htmlescape.vim

@@ -0,0 +1,15 @@
+" via: http://vim.wikia.com/wiki/HTML_entities
+function HtmlEscape()
+  silent s/&/\&/eg
+  silent s/</\&lt;/eg
+  silent s/>/\&gt;/eg
+endfunction
+
+function HtmlUnEscape()
+  silent s/&lt;/</eg
+  silent s/&gt;/>/eg
+  silent s/&amp;/\&/eg
+endfunction
+
+map <silent> <c-h> :call HtmlEscape()<CR>
+map <silent> <c-u> :call HtmlUnEscape()<CR>