Changed the Linux native code files to use the same amalgamation file structure as the mac and windows ones do; made a small adjustment to the amalgamator, and removed some redundancy from the amalgamated files (if you are amalgamating code yourself, please build a new copy of the amalgamator, as the old one won't work correctly on this new code); fixed a few minor build warnings in linux

extras/binarybuilder/juce_AppConfig.h

@@ -1,10 +1,16 @@
-
 /*
     This file contains settings that you might want to explicitly apply to 
-    the your build.
+    your Juce build.
 
-    Most of these are turned on or off by default, but you can override
-    that setting here by un-commenting it and giving it a 1 or 0 value.
+    These flags enable or disable juce features - if you're linking to juce as
+    a library, then to change them, you'd need to alter your juce_Config.h file and
+    recompile the juce lib. But because we're using the amalgamated file, you can
+    just include this file before including your juce_amalgamated.cpp file to
+    have the same effect.
+
+    If you leave any of these commented-out, they'll take on the default value 
+    assigned to them in juce_Config.h, so to force them on or off, just set them
+    to an explicit 0 or 1 in here.
 */
 
 #define JUCE_ONLY_BUILD_CORE_LIBRARY   1