- fix for issue 772

- fixed some issues in zstream that prevented to use "getline" in zipped streams 
- added a "pooled buffers" system to keep a cache of file descriptors. This is potentially dangerous though, but shaves several seconds of loading time on the PSP. If problems arise on other platforms I'll make it a compilation parameter
- gracefully fail when calling manacost information on a not properly initialized mana cost

JGE/include/JFileSystem.h

@@ -77,6 +77,8 @@ public:
 
 	static void Destroy();
 
+    // closes temporary files when the machine goes to sleep
+    void Pause();
 	//////////////////////////////////////////////////////////////////////////
 	/// Open file for reading.
 	///