Added code to read Ghost spawn info from map, pellet counting

characters.h
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- Modified Ghost constructor to a more logical param order

maps.h
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- Added GhostData struct to store Ghost spawning info from map files
- Map
	- Added int pellets to store number of pellets
	- Added pointer to vector<GhostData> *ghostDataStorage to store all GhostData encountered in the file
	- Modified constructor
		- To process GhostData
		- To count pellets on map