Started to convert KnowledgeModel to NoSQL-DB
Reload view after new knowledge was added
one can add new tags to the database
fixup
fixup
fixup
WIP
TagModel: Implement filling tree from NoSQL-DB
tags can be added as childs
TagModel: Implement deleting tags
NewTagDialog: Adapt for combobox (better fixup!)
MainWindow: Change from tag id from int to str (Better fixup!)
WIP -- Experiments with Indexes and CodernityDB
One can now open the edit dialog for knowledge again
NewKnowledgeDialog: Make compatible with PyQt4
Fix adding knowledge again
Adding knowledge with tags is possible again
Cleanup => Fixup
TagModel: Fix ID-Type (Fixup!)
Filter by clicking tags works again