============
Major Changes between 1.2.x and 1.3.x
+File access methods
+-------------------
+* introduced file-accessor functions rrd_read/rrd_seek/rrd_write
+* implemented full mmap-based file access with madvise hints for improved
+ scalability, much reduced memory-footprint and much less blocking on
+ disk
+* implemented optional full file-descriptor access instead of FILE* access
+
Graphing
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* libart has been replaced by cairo/pango