updated bg grid model, verified against time-series sim
added AbstractProposal to separate nodes from auxillaryNodes in MH move
revert AbstractProposal implementation, had problems interfacing with MonteCarloSampler
Merge branch 'development' of github.com:revbayes/revbayes into development
rm text msg warning
Automatic detection of relative/absolute file system search expression
Merge branch 'development' of github.com:revbayes/revbayes into development
Fixes backwards compability.
Cleaning up
Now the RevLanguage version of ContinuousCharacter Data has the same inheritance structure as its core counterpart.
Merge branch 'development' of https://github.com/revbayes/revbayes into language-edit

Conflicts:
	src/revlanguage/datatypes/evolution/datamatrix/RlContinuousCharacterData.h
more work on the tutorials: phylogenetic comparative methods