fix(UISrefStatus): Fix memory leak -- take only one inner subscription  at a time. (#120)
fix(UISrefStatus): Fix memory leak -- take only one inner subscription  at a time. (#120)

Closes #21
ui-router/angular,ui-router/ng2,wawyed/ng2,ui-router/angular,wawyed/ng2,ui-router/angular,ui-router/ng2,wawyed/ng2,ui-router/angular