several improvements to the metadata tree + simple search within the tree
direct injection of the split pane to the main ctrl
Merge pull request #17 from asobolev/master

Metadata tree improvements

LGTM
alphabetical sorting of metadata tree elements
added project file browsing
refactored metadata tree in a separate package. added type resolution for RDF literals while rendering
included reverse relations into the metadata tree - with fixes
excluded logger from metadata service
removed file browsing
renamed files in the metadata tree package
draft of the table to display metadata literals