added clone functionality.
enabled JgitModelImport to deal with cloned repositories.
organized imports.
fixed warnings in manifest.
added project cached to gitignore.
ignore.
removed .cache from index
added functionality to a point where I can create a GitModel with
MoDisco models of the Java-parts.
Added functionality to a point where references (bindings) are imported.
Incremental binding resolution should work, but not yet tested.
Refactored the git import: git and modisco import are seperate steps
now, one can import modisco visiting the git model from child to parent
and vice versa.