DiffractionObject can now be instantiated directlyand basic data structure is a 2D array with everything in it

Author: sbillinge

news/constructor.rst

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+**Added:**
+
+* <news item>
+
+**Changed:**
+
+* arrays and attributes now can be inserted when a DiffractionObject is instantiated
+* data are now stored as a (len(x),4) numpy array with intensity in column 0, the q, then tth, then d
+* `DiffractionObject.on_q`, on_tth and on_d are now methods and called as DiffractionObject.on_q() etc.`
+
+**Deprecated:**
+
+* <news item>
+
+**Removed:**
+
+* <news item>
+
+**Fixed:**
+
+* <news item>
+
+**Security:**
+
+* <news item>