add centered label class

[gabrielgrant]

this class centers each line, rather than left-aligning. this allows for different sized lines of text to be centered together, for example

for a single text object spanning multiple lines, (eg if printing on a vertically-oriented label) it may make more sense to use an approach like this: https://gist.github.com/turicas/1455973

[NotAFile]

I assume you forgot you left these debug prints in

[NotAFile]

This one too

[gabrielgrant]

Ah, good catch(es). I had actually just copied most of the contents of that method (including those debug print statements) from the original Label class:

labelprinterkit/labelprinterkit/label.py

Lines 76 to 79 in 5540c03

	print("presize", xdim, ydim, height)
	xdim = round((height / ydim) * xdim)
	print("calcsize", xdim, ydim)

The new commit changes all of them over to debug logger statements