Fuku

**Changes:**

`fuku task rm <name>` has been updated:
- more verbose, will print a line for each task definition deleted
- sleep for 10 seconds when AWS throttle us
- <name> is optional, this way we can delete task definition for the app itself.

Changes:
- `fuku app expose` accepts multiple domains for apps that needs to be available on multiple dns names. e.g. `fuku app expose <app_name> <domain.first.com> <domain.second.com>

Added:
- `fuku route mk <name_of_recordset> <zone_name>` which finds the currently selected app's ELB, and maps the record set name in the corresponding zone name.

**Added**

* `fuku app rm <app>`, deletes a specific "fuku app" by deleting the target group.

* `fuku app hide <app>`, deletes all existing ELB rules against the app.

* `fuku pg db rm <app>`, drops the app database and role.

* `fuku redis rm <app> --group <group>`, deletes the app redis cluster.
If group is passed, deletes the subnet group as well.

* `fuku task rm <task>`, deletes all task definitions for the app.

**Updated**
* We do not need create IAM groups to define an app anymore, target groups are enough to define an app.

* Updated `fuku app expose <domain> <load_balancer_index>` to `fuku app expose <app> <domain>`, it will now automatically discover which ELB has enough space for rules.

* Made use of boto3 paginator objects to sort and filter AWS directly in the api.

* `fuku service ls <service>` now only prints simple list. For long output, use `fuku service ls <service> --long`