Added configuration file system.

Uses QSettings on citra-qt, and inih on citra-cli.

CMakeLists.txt

@@ -68,7 +68,7 @@ if (ENABLE_GLFW)
         if (NOT APPLE)
             find_package(X11 REQUIRED)
         endif()
-        
+
         find_package(PkgConfig REQUIRED)
         pkg_search_module(GLFW REQUIRED glfw3)
     endif()
@@ -127,6 +127,10 @@ get_git_head_revision(GIT_REF_SPEC GIT_REV)
 git_describe(GIT_DESC --always --long --dirty)
 git_branch_name(GIT_BRANCH)
 
+set(INI_PREFIX "${CMAKE_CURRENT_SOURCE_DIR}/externals/inih")
+include_directories(${INI_PREFIX})
+add_subdirectory(${INI_PREFIX})
+
 # process subdirectories
 if(ENABLE_QT)
     include_directories(externals/qhexedit)