Log Message:
Changes 0.5.2:
	Bugfixes in exiv2 extractor fixing remaining issues.
	Changed plugins to not use filename but always only
	rely on mmapped memory.  Extended API with function
	that allows running getKeywords on data in memory
	(instead of filename).  Extended API with encode
	and decode functions for binary metadata.

Changes 0.5.1:
	Preliminary integration of exiv2 support (not enabled
	by default due to bugs).  Moved Python and Java
	bindings into separate packages.
	print keywords.