implement basic comments

initial.d

@@ -298,6 +298,8 @@ locate(size_t l, size_t c)
  +
  + The following rules apply when parsing:
  + $(UL
+ + $(LI if a hash character `#` is found at the beginning of a line,
+ +      the rest of the line is ignored)
  + $(LI if a left square bracket character `[` is found at
  +      the beginning of a line, the line is considered a
  +      section heading)
@@ -340,6 +342,7 @@ readINI(ref INIUnit ini, string data)
 
 	section = ini.defaultSection;
 
+	nextline:
 	foreach (size_t ln, string line; data.splitLines()) {
 		line = line.strip();
 		if (line.length == 0)
@@ -349,6 +352,14 @@ readINI(ref INIUnit ini, string data)
 		text = key = value = "";
 		foreach (size_t cn, char ch; line) {
 			switch (ch) {
+			/* comment? */
+			case '#':
+				if (cn == 0)
+					continue nextline;
+
+				text ~= ch;
+				break;
+
 			/* beginning of a section heading? */
 			case '[':
 				if (cn == 0) /* beginning of line? */