DART 5.1.1
- Added bullet dependency to package.xml [#523]
- Improved handling of missing symbols of Assimp package [#542]
- Improved travis-ci build log for Mac [#529]
- Fixed warnings in Function.cpp [#550]
- Fixed build failures on AppVeyor [#543]
- Fixed const qualification of ResourceRetriever [#534, #532]
- Fixed aligned memory allocation with Eigen objects [#527]
- Fixed copy safety for various classes [#526, #539, #524]