straighten out some dependencies & exclusions
straighten out some dependencies & exclusions

Fixes #63

nuxusr/walkman,tilt-eng/betamax,robfletcher/betamax,betamaxteam/betamax,betamaxteam/betamax,Banno/betamax,georgecodes/betamax,dadoonet/betamax,nuxusr/walkman,Banno/betamax,georgecodes/betamax,felipecsl/walkman,felipecsl/okreplay,dadoonet/betamax,Banno/betamax,dadoonet/betamax,tilt-eng/betamax,felipecsl/okreplay,georgecodes/betamax,robfletcher/betamax,tilt-eng/betamax,nuxusr/walkman,felipecsl/walkman