removal of LowMemoryFootprintDocument
starting brilltagger and brilltrainer from scratch
small description plus a bit of history
Merge branch 'feature/revamp/scratch' into develop
Sentence and Token concepts as simple List and Map

DefaultSentence and DefaultToken are therefore simple
extensions of ArrayList and HashMap.
brilltrainer basic interface

Not working yet, but a startup of how it will look like.
first working (simple) case of brilltrainer
CorpusStat to collect general info about Corpus
Merge branch 'feature/revamp/simple' into develop