Do not allow empty string as app_key
Fixing multiple pusher:subscription_succeeded events being triggered after reconnection
removing redundant & duplicate code
Refactor last subscription fix a bit
Merge branch 'presence-subscription_succeeded-fix'
Minor formatting improvement
Merge branch 'empty-appkey'
Detect Flash without loading flashfallback.js
Change !! to a Boolean function call
Merge branch 'detect_flash' into 1.12.6
Bump version number to 1.12.6
Merge branch 'r1.12.6'