more work on implementing toAQLFragment()
allow to export metadata with the "metakeys" parameter in GridVisualizer
removed whitespace in GridExporter
mention the new metakeys feature of GridExporter in the help
allow GridExporter to output metadata, fixes #154
new way to check if user is logged in: update the CorpusListPanel user specific corpus group code
fixed #155
Merged 'develop'.
more null checks for statementcontroller
Merged 'develop'.
actually use the new ANTLR based parser in the real code
removed the old antlr3 grammar
more tests
Merge branch 'tokengrid'
add artificial and node if there is only a top or node with leafs
fixing the aliased table in name in the corpus path join
don't set parent to null if node was already moved and fixed the binary making
allow queries that are unecessarly nested in braces, e.g

( ( tok ) )
allow "-" as part of IDs
add identity operator