Tomodachi

- Solves issue with Segmentation fault in Python 3.6 during hot-reload on Linux.

- Fixes type hinting issues with Python 3.5.1.

- Reworked watcher since it ended up using 90% CPU of the running core due to constant re-indexing (mstat) of every file every 0.5s. Full re-index will now only run every 10 seconds, since it's more rare that new files are added than existing files edited. Watcher for edited existing files will still run at the same intervals.
- Watched file types may now be specified via configuration via `options.watcher.watched_file_endings`.

- Messages via SNS+SQS or AMQP over 60000 bytes as JSON will now be sent in a gzipped base64 encoded format to allow for larger limits and lower potential SNS costs due to multiplexed messaging.
- Fixes an issue with multidict 3.2.0 on hot-reload which made the tomodachi application crash.

- Possibility to requeue messages that result in specific exceptions. Exceptions that will nack the message (for AMQP transport) is called `AmqpInternalServiceError`. Exceptions that won't delete the message from the queue and in turn will result in it to "reappear" unless configured non-default (for AWS SNS+SQS transport) is called `AWSSNSSQSInternalServiceError`.

- Corrected an issue regarding crontab notation for scheduling function calls where it didn't parse the upcoming date correctly if both isoweekday and day part were given.