- cgui: now convert EventName to lowercase in SendEventToAll

- compression: now use "fastest" compression mode and more memory unless
in FINAL build. this greatly speeds up archive generation at expense of
1.5% size increase (fine during development). done because profiling
shows ZLib accounts for 78% of CPU; practically nothing else shows up,
which shows effectiveness of compressing in parallel with reading from
disk.

- file_cache: documented; fixed several potential issues with exact_buf
when invalidating files.

This was SVN commit r3586.

source/gui/CGUI.cpp

@@ -324,8 +324,15 @@ void CGUI::TickObjects()
 
 void CGUI::SendEventToAll(CStr EventName)
 {
+	// janwas 2006-03-03: spoke with Ykkrosh about EventName case.
+	// when registering, case is converted to lower - this avoids surprise
+	// if someone were to get the case wrong and then not notice their
+	// handler is never called. however, until now, the other end
+	// (sending events here) wasn't converting to lower case,
+	// leading to a similar problem.
+	// now fixed; case is irrelevant since all are converted to lower.
 	GUI<CStr>::RecurseObject(0, m_BaseObject, 
-		&IGUIObject::ScriptEvent, EventName);
+		&IGUIObject::ScriptEvent, EventName.LowerCase());
 }
 
 //-------------------------------------------------------------------