New syntax highlighter for INI files

Features:
- comments after ; and # (even on key=value lines)
- section highlight
- escaping in values
- error checking for [sections] and incomplete key=value pairs

ftyperc

@@ -785,3 +785,10 @@
  Java's .properties
 *.properties
 -syntax properties
+
+ INI file
+*.ini
+-syntax ini
+
+*hgrc
+-syntax ini