Add how-to entry for spelling of Gammapy [ci skip]
@@ -15,6 +15,13 @@ it's not a complete list of how to do everything in Gammapy.
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+Spell and pronounce Gammapy
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+The recommended spelling is "Gammapy" (as a proper name), where the syllable "py"
+is pronounced like the english word "pie".
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Access IACT data
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