Refactor to copy data instead of using user-provied data array directly

git-svn-id: https://flot.googlecode.com/svn/trunk@137 1e0a6537-2640-0410-bfb7-f154510ff394

NEWS.txt

@@ -40,6 +40,11 @@ Changes:
 - The option legend.margin can now specify horizontal and vertical
   margins independently (suggestion by someone who's annoyed).
 
+- Data passed into Flot is now copied to enable further processing
+  before it hits the drawing routines. As a side-effect, this should
+  make Flot more robust in the face of bad data (and fixes issue 112).
+
+
 Bug fixes:
 
 - Fixed two corner-case bugs when drawing filled curves (report and