Add highlight strings to profiles.

These are highlight strings other than the current nickname that
the user wishes to highlight on (e.g. their real name, or 'D*').

src/com/dmdirc/config/profiles/Profile.java

 
 import com.google.auto.value.AutoValue;
 
+import java.util.Collection;
+import java.util.Collections;
 import java.util.List;
 import java.util.Optional;
 
 
     public abstract List<String> getNicknames();
 
+    public abstract Collection<String> getHighlights();
+
     public static Profile create(final String name, final String realName,
             final Optional<String> ident, final List<String> nicknames) {
-        return new AutoValue_Profile(name, realName, ident, nicknames);
+        return create(name, realName, ident, nicknames, Collections.emptyList());
+    }
+
+    public static Profile create(final String name, final String realName,
+            final Optional<String> ident, final List<String> nicknames,
+            final Collection<String> highlights) {
+        return new AutoValue_Profile(name, realName, ident, nicknames, highlights);
     }
 
 }

src/com/dmdirc/config/profiles/YamlProfileStore.java

 
 import java.nio.file.Path;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
             final String name = requiredString(map, "name");
             final String realname = requiredString(map, "realname");
             final Optional<String> ident = Optional.ofNullable(optionalString(map, "ident"));
-            final List<String> nicknames = asList(map.get("nicknames"), s -> Optional.of(s.toString()));
-            return Optional.of(Profile.create(name, realname, ident, nicknames));
+            final List<String> nicknames =
+                    asList(map.get("nicknames"), s -> Optional.of(s.toString()));
+            final List<String> highlights =
+                    map.containsKey("highlights")
+                            ? asList(map.get("highlights"), s -> Optional.of(s.toString()))
+                            : Collections.emptyList();
+            return Optional.of(Profile.create(name, realname, ident, nicknames, highlights));
         } catch (IllegalArgumentException ex) {
             LOG.info("Unable to read profile", ex);
             return Optional.empty();
         map.put("name", object.getName());
         map.put("realname", object.getRealname());
         map.put("nicknames", object.getNicknames().toArray());
+        map.put("highlights", object.getHighlights().toArray());
         object.getIdent().ifPresent(v -> map.put("ident", v));
         return map;
     }