Add profile and savegame fetchers in SystemUtils

This breaks the tests compilation. :/

src/app/system.cpp

@@ -187,3 +187,13 @@ float CSystemUtils::TimeStampDiff(SystemTimeStamp *before, SystemTimeStamp *afte
 
     return result;
 }
+
+std::string CSystemUtils::profileFileLocation()
+{
+	return std::string("colobot.ini");
+}
+
+std::string CSystemUtils::savegameDirectoryLocation()
+{
+	return std::string("savegame");
+}

src/app/system.h

@@ -129,6 +129,12 @@ public:
     //! Returns the exact (in nanosecond units) difference between two timestamps
     /** The difference is \a after - \a before. */
     virtual long long TimeStampExactDiff(SystemTimeStamp *before, SystemTimeStamp *after) = 0;
+
+    //! Returns the profile (colobot.ini) file location
+    virtual std::string profileFileLocation();
+
+    //! Returns the savegame directory location
+    virtual std::string savegameDirectoryLocation();
 };
 
 //! Global function to get CSystemUtils instance

src/common/profile.cpp

@@ -19,6 +19,8 @@
 
 #include "common/logger.h"
 
+#include "app/system.h"
+
 #include <utility>
 #include <cstring>
 #include <boost/property_tree/ini_parser.hpp>
@@ -41,7 +43,7 @@ CProfile::~CProfile()
     {
         try
         {
-            bp::ini_parser::write_ini("colobot.ini", m_propertyTree);
+            bp::ini_parser::write_ini(GetSystemUtils()->profileFileLocation(), m_propertyTree);
         }
         catch (std::exception & e)
         {
@@ -55,7 +57,7 @@ bool CProfile::InitCurrentDirectory()
 {
     try
     {
-        bp::ini_parser::read_ini("colobot.ini", m_propertyTree);
+        bp::ini_parser::read_ini(GetSystemUtils()->profileFileLocation(), m_propertyTree);
     }
     catch (std::exception & e)
     {

src/ui/maindialog.cpp

@@ -18,6 +18,7 @@
 #include "ui/maindialog.h"
 
 #include "app/app.h"
+#include "app/system.h"
 
 #include "common/global.h"
 #include "common/event.h"
@@ -173,7 +174,7 @@ CMainDialog::CMainDialog()
 
 
     m_sceneDir = "levels";
-    m_savegameDir = "savegame";
+    m_savegameDir = GetSystemUtils()->savegameDirectoryLocation();
     m_publicDir = "program";
     m_userDir = "user";
     m_filesDir = "files";