sunpy/sunpy — pull request #1183 by wafels (2014-09-17 18:26:41+00:00)
Title: small fix to allow sunpy 0.2 to read in SWAP JP2 files

SWAP JP2 files do not have a 'comment' key in header. Sunpy 0.2 was failing in reading SWAP JP2 files. This patch tests for the existence of the 'comment' key.