Exposed RageFile Flush function to Lua. Updated changelog.

Docs/Changelog_sm5.txt

@@ -4,6 +4,22 @@ The StepMania 5 Changelog covers all post-sm-ssc changes. For a list of changes
 from StepMania 4 alpha 5 to sm-ssc v1.2.5, see Changelog_sm-ssc.txt.
 ________________________________________________________________________________
 
+2015/06/03
+----------
+* [Actor] bounce and bob effects no longer round pixel coords. [kyzentun]
+* [RageFile] Exposed Flush function to Lua. [kyzentun]
+
+2015/05/29
+----------
+* [OptionsList] The OptionsListQuickChange, OptionsListLeft, and
+  OptionsListRight messages now have a Selection parameter that has the id of
+  the selection the player moved to. [nixtrix]
+
+2015/05/24
+----------
+* [Gameplay] Autokeysounds are no longer twice as loud when playing
+  keysounded charts with two players. [nixtrix]
+
 2015/05/15
 ----------
 * [BMS] .lua files defined in the #BMP tags now work as BG animations, and the

Docs/Luadoc/Lua.xml

@@ -1370,6 +1370,7 @@
 			<Function name='AtEOF'/>
 			<Function name='ClearError'/>
 			<Function name='Close'/>
+			<Function name='Flush'/>
 			<Function name='GetError'/>
 			<Function name='GetLine'/>
 			<Function name='Open'/>

Docs/Luadoc/LuaDocumentation.xml

@@ -4052,6 +4052,9 @@ save yourself some time, copy this for undocumented things:
 	<Function name='destroy' return='void' arguments=''>
 		Safely deletes the file handle.
 	</Function>
+	<Function name='Flush' return='' arguments=''>
+		Flushes the buffer for the file handle, writing any pending output to disk.
+	</Function>
 	<Function name='GetError' return='string' arguments=''>
 		Gets the last error message and returns it.
 	</Function>

src/RageFile.cpp

@@ -344,6 +344,12 @@ public:
 		return 1;
 	}
 
+	static int Flush(T* p, lua_State* L)
+	{
+		p->Flush();
+		COMMON_RETURN_SELF;
+	}
+
 	static int Read( T* p, lua_State *L )
 	{
 		RString string;
@@ -411,6 +417,7 @@ public:
 		ADD_METHOD( Open );
 		ADD_METHOD( Close );
 		ADD_METHOD( Write );
+		ADD_METHOD(Flush);
 		ADD_METHOD( Read );
 		ADD_METHOD( ReadBytes );
 		ADD_METHOD( Seek );