Fix tc-copy cannot import name 'imap'

[sandypm007]

Fix #220

[sbrunner]

I don't understand why you do this change? Shouldn't just be:

Suggested change

	if tile.content_type:
	if tile.content_type.startswith("image/"):
	tile.data = response.content
	else:
	tile.error = response.text
	elif response.status_code != 200:
	tile.error = "Unable to read content type {0}".format(title.content_type)
	if tile.content_type and tile.content_type.startswith("image/"):
	tile.data = response.content
	else:
	tile.error = response.text

[sandypm007]

Sometimes the response has content but not content type header set so it continues failing, i tested it using openstreetmap

[sbrunner]

Have you an example of URL that didn't returns a content-type?

[sbrunner]

I just merge the first part, and for this I do an alternative as #673, does it look good?

[maxbattlemage]

Wouldn't i it be better coding three commands, Ill make it up

[sbrunner]

Fixed with #673