plugin-frame-preprocessing: make frames hierarchy aware

[hinneburg]

Computation of frames needs to take topic - and pos hierarchies into account.

• [x] Change delimiter table to chunk table with start and end position
• [x] Store frametypes
• [x] Go through all chunks and compute hierarchical topic frame occurrences
• [ ] aggregate frame occurrence into frames
• [ ] rank frames

[hinneburg]

First idea how to do it in SQL. frames_hierarchical.txt

[hinneburg]

continue the SQL idea hierarchicalFramesSQLIdea.txt

[hinneburg]

This commit 801093361b578c06cccc84689470e55d7ccaab15 belongs to #239.