jni BlackboardAttribute consutructor changes to handle null strings and byte[].
Formatting changes.
update source level from java 1.6 to 1.7 in the project.
jni properly deprecate context
Merge pull request #153 from adam-m/master

jni fix bb attribute constructor, update java source version
Merge remote-tracking branch 'upstream/master'

Conflicts:
	bindings/java/nbproject/project.xml