Fixes to getFlatIcon and more. (#3353)

(Rebased and reopened #3347)

Attempted to fix pipe and door rendering
Fixed Table, carpet rendering
Ported full map-capture tool from bay, with python script to merge captured images.

tools/mapcapturemerge/imageHelpers.py

@@ -0,0 +1,15 @@
+from PIL import Image
+import re
+reg_findnums = re.compile("[0-9]+")
+
+class ImageFile:
+    def __init__(self, filename, path):
+        self.filename = path
+        nums = reg_findnums.findall(filename)
+        self.cords = (int(nums[0]), int(nums[1]), int(nums[2]))
+        self.range = int(nums[3])
+
+    def getImage(self):
+        im = Image.open(self.filename)
+        im.load()
+        return im