Sarietta/drag and drop elements 2019 09 06#8

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sarietta:sarietta/drag_and_drop_elements_2019-09-06

Commits on Sep 9, 2019

Refactored the way sprites are drawn into a Util class with a singleton accessor to avoid re-loading images every time
sarietta
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Added a new object list for easy drag and dropping of elements on to the mapscene
sarietta
committed