Added cached_counters for links on domain
Domains CRUD should work by domain instead of subdomain

  [x] Change cron to base on domains
  [x] Join all current domains
[#KOD-153] : SEO TOOL: Status by domain not url

	- [x] Create new status field to domain
		- [x] Create field
		- [x] Fill in status
		- [x] Remove status from urls
	- [x] Migrate all domain statuses from urls
	- [x] Remove logic for setting all the domain urls as...
[KOD-153] : Skip crawling domains marked as OK
[#KOD-153] : Edit domain status with buttons
[#KOD-153] : Search by domain status
[#KOD-170] : Added next button to domain view
Added unique field to url.url
Pull request fixes
fix empty domain on crawler & sort url
Fixed links count calculation
Subnet crud
Merge pull request #48 from kodify/subnets

Subnets + Sort order + Status to domain