* "BrushAlwaysCaulk" option is saveable for brush types other than q3

* brush format is preference for [maptypes, brushtypes]: [mapq1, quake], [mapq2, quake2], [mapq3, quake3]:
		preferences->Brush->Brush type: Axial projection, Brush primitives, Valve 220
	* autodetect brush type on map opening
	* brush face surfaceflags are optional on loading for flexibility
	* 'Snap planes to integer grid' option is always off by default

libs/script/scripttokeniser.h

@@ -41,7 +41,7 @@ typedef bool ( ScriptTokeniser::*Tokenise )( char c );
 
 Tokenise m_stack[3];
 Tokenise* m_state;
-SingleCharacterInputStream<TextInputStream> m_istream;
+SingleCharacterInputStreamDoubleBuffered<TextInputStream> m_istream;
 std::size_t m_scriptline;
 std::size_t m_scriptcolumn;
 
@@ -329,6 +329,9 @@ std::size_t getLine() const {
 std::size_t getColumn() const {
 	return m_scriptcolumn;
 }
+bool bufferContains( const char* str ){
+	return m_istream.bufferContains( str );
+}
 };