Mschauer/Bridge.Jl: Release V0.6.0

This release contains a much improved implementation of guided proposals, which adopt a new interface. The corresponding improvements for partial guided bridges are postponed for the next release, so they still use the old interface. New scripts hypo.jl and elliptic.jl in the example directory to verify the correctness of the implementation. Fix: The llikelihood function is missing a factor -1/2 from the former likeliXcirc in SDE.jl , discovered by the method. Add a README.md file describing the examples Better test coverage