Enhancement - Edit command

- Added more fields to the edit command.
- Added a more useful slurp implementation.
- Updated advanced.html with directions on use.

src/util.cpp

@@ -429,6 +429,31 @@ bool slurp (
   return false;
 }
 
+////////////////////////////////////////////////////////////////////////////////
+bool slurp (
+  const std::string& file,
+  std::string& contents,
+  bool trimLines /* = false */)
+{
+  contents = "";
+
+  std::ifstream in (file.c_str ());
+  if (in.good ())
+  {
+    std::string line;
+    while (getline (in, line))
+    {
+      if (trimLines) line = trim (line);
+      contents += line;
+    }
+
+    in.close ();
+    return true;
+  }
+
+  return false;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 void spit (const std::string& file, const std::string& contents)
 {