Simpler configuration check allows not-installed to be caught earlier.

Issue #138
Abstracted out loading of openjp2, openjpeg libraries.  #138

That much was common to both load_openjp2 and load_openjpeg.  Reduces
number of different moving parts.
More refactoring, fewer branches.  #138
Prepping 0.5.7 release.
Merge branch 'issue138'
Add additional path existance check to avoid unnecessary warning.  #138

The warnings would come about if running on mac or windows where the
library could not be found via ctypes or the configuration file.
Prepping for 0.5.8
Merge branch 'issue138'
Have to put the check for path existance into the library default stanza.

Issue #138
Prepping 0.5.9 release.
Merge branch 'issue138'
Merge branch 'master' into devel
Removed class-0 conformance tests.  Closes #139

Keeps us in sync with upstream openjpeg.  See r2350.
Merge branch 'issue139' into devel
Changelog update
Merge branch 'devel' of github.com:quintusdias/glymur into devel

Conflicts:
	CHANGES.txt