added chart and chart entry classes

Signed-off-by: Peter Menke <pmenke@googlemail.com>
Merge branch 'master' of https://github.com/sfb673/ruby-for-linguists into develop
added rule and rule set

Signed-off-by: Peter Menke <pmenke@googlemail.com>
added chart and chart entry classes

Signed-off-by: Peter Menke <pmenke@googlemail.com>
added SimpleChartParser, with some specs for the parser and its components

Signed-off-by: Peter Menke <pmenke@googlemail.com>
Tree-Aufgabe gelöst

Signed-off-by: Peter Menke <pmenke@googlemail.com>
added descriptive comments

Signed-off-by: Peter Menke <pmenke@googlemail.com>
improvements for simple tree and simple tree node

Signed-off-by: Peter Menke <pmenke@googlemail.com>
added to_s method

Signed-off-by: Peter Menke <pmenke@googlemail.com>
Merge branch 'refs/heads/develop'