Added operation getRelations* into DocumentProcessor (interface for automatic relation recognition)

(cherry picked from commit 64f56ede0d8a2474841e7d9dfe4bc96c5b842371)
Merge branch 'client'
Client now uses interface for recognizing relations
Added requerements and changed outline
Merge remote-tracking branch 'remotes/origin/client'
WiP: sequence diagram, use cases, mockups
Added TODO
New images cropped and included into the documentation provisionally
Added forgotten file
New images included into the documentation provisionally
Added section Future extensions
Merge branch 'master' of https://github.com/PreXident/TextAn
Added a description for scheduler
Reverted changes in hibernate description
Updated images of the client
Fixes to PathController
Added image for path wizard
Added schema for command package
Added overview of commands package into architecture
DB Documentation basics