housecleaning for 0.7.0 release
skip one test for openjpeg versions < 1.5
clarification of wording
add testing mention of CentOS
skipping some tests on versions 1.3 and 1.4
minor doc mods
more doc updates
Merge branch 'master' into devel

Conflicts:
	CHANGES.txt
	docs/source/conf.py
	docs/source/roadmap.rst
	glymur/version.py
updated README to mention Python 3.4
bumping to 0.7.1
Merge branch 'release-0.7.1'