added documentation header
fixed tutorial directory
started doxygen documentation of examples
directory fix: tutorials -> tutorial
documentation
adapted to ViennaMesh
Merge branch 'master' into FlorianRudolf/feature-documentation
more documentation, changed LICENSE syntax, added more chapters
more documentation: introduction, algorithms, ...
fixed parameter information
more documentation: all algorithms, added features and types
Merge branch 'FlorianRudolf/feature-documentation' into next