Added project source files

This commits adds a FileTreeWalker module and a FileDigestCalculator.
Modified FileDigestCalculator to output triples instead of strings.
Added module to reorder elements in triples
Completed example showing how to find duplicate files
Added project source files

This commits adds a FileTreeWalker module and a FileDigestCalculator.
Modified FileDigestCalculator to output triples instead of strings.
Prepare for move to core package
Removed modules which are not yet moved to core from flux-commands.properties
Fixed Java 6/7 compatibility issue
Added modules from Xoff/metafacture-extra.

Modules:
	- FileDigestCalculator
	- TripleReorder

Merge remote-tracking branch 'mf-extra/move-to-core' into adding-modules-from-mf-core

Conflicts:
	src/main/resources/flux-commands.properties
Ignore name/date line in when checking license header
Merge pull request #86 from cboehme/adding-modules-from-mf-core

Java 6 compatible modules from Xoff/metafacture-core