Fix typo in faulted variable name
Missing '@' caused release to reference local variable instead of the reference count tracked by the object
Fix typo so that observers tracked by AsyncSubject are cleared on error.
Add local variable in scope, so that assignment in closure has an effect
Merge pull request #25 from petergoldstein/bugfix/fix_missing_scoped_var_declaration

Add local variable in scope, so that assignment in closure has an effect
Merge pull request #24 from petergoldstein/bugfix/fix_count_typo

Fix typo in RefCountSubscription
Merge pull request #21 from petergoldstein/bugfix/fix_faulted_typo

Fix typo in faulted variable name
Merge pull request #23 from petergoldstein/bugfix/fix_observers_clear_on_error

Fix typo so that observers tracked by AsyncSubject are cleared on error.