updated isolation model
IM model
Fixed header for prior samples
IM epochs model
Merge branch 'feature/sample_from_priors' into develop
Just bumped a version number
Change to documentation string
Made it an error to provide alignments when you specify that you are sampling from the prior
Bumped version
Merge branch 'release/0.6.1' into develop
Merge branch 'develop' into feature/variable_migration_mcmc