Update Doxygen documentation for tests

Namespaces are neat.

Doxyfile

@@ -51,7 +51,7 @@ PROJECT_BRIEF          = "A C++ server for Attorney Online 2"
 # pixels and the maximum width should not exceed 200 pixels. Doxygen will copy
 # the logo to the output directory.
 
-PROJECT_LOGO           = ./resource/icon/32.png
+PROJECT_LOGO           = ./akashi/resource/icon/32.png
 
 # The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute) path
 # into which the generated documentation will be written. If a relative path is
@@ -830,6 +830,8 @@ WARN_LOGFILE           =
 # Note: If this tag is empty the current directory is searched.
 
 INPUT                  = akashi/ \
+                         lib/ \
+                         tests/ \
                          README.md
 
 # This tag can be used to specify the character encoding of the source files

tests/unittest_area/tst_unittest_area.cpp

@@ -1,22 +1,34 @@
 #include <QtTest>
 
-// add necessary includes here
+#include <include/area_data.h>
 
-class UnitTest_Area : public QObject
+namespace tests {
+namespace unittests {
+
+/**
+ * @brief Unit Tester class for the area-related functions.
+ */
+class Area : public QObject
 {
     Q_OBJECT
 
 public:
 
 private slots:
+    /**
+     * @test Example test case 1.
+     */
     void test_case1();
 };
 
-void UnitTest_Area::test_case1()
+void Area::test_case1()
 {
     QFAIL("Guaranteed failure -- testing tests subdirs setup");
 }
 
-QTEST_APPLESS_MAIN(UnitTest_Area)
+}
+}
+
+QTEST_APPLESS_MAIN(tests::unittests::Area)
 
 #include "tst_unittest_area.moc"