The controller will retrieve all the endpoints at the beginning of its
loop. When changes need to be applied, the provider may need to query
the endpoints again. Allow the provider to skip the queries if its data was
cached.
* Make suitableType() be Endpoint method
With this change it becomes possible to work with endpoint
of empty type in packages other than "provider". Also
it seems logical for a smart property getter without side effects
to be a method rather than a function in different package
* Make plan computation work correctly with multi-target domains
* fix drawing
* drop comments
* fix boilerplate header
* fix comment
* fix the bug with empty map
* rework registry to support random lables
* serialize->serializeLabel function rename
* golint for err variable naming
* add additional test
* add tests for current case where one resource can generate multiple endpoints
* make labels have its own type, add serialization as a method
* add comment for exported error
* use greater rather than not equal zero
* update changelog
* continue on controller loop error
* add logging in source
* use formatter on logChanges for endpoints
* fix log messages, log skipped records
* add logging in aws, uppercase the rest
* respect google dry run policy
* add ing/svc namespace/name on logging
* fix error logging on template failure
* fix bugs, propagate template error
* log if nothing is being updated, debug log skipped endpoints
* change zone-not-found logging order
* kickoff txt registry
* fix inmemory dns provider to include recordtype info for validation
* Merge master
* fix ununsed variable in inmemory provider
* add tests for records
* add test for no prefix name formatter
* implement apply changes with tests
* add flag to enable txt registry
* add txt registry to main
* improve sort testing
* filter out non-owned records
* NewEndpoint(...) requires record type
* use newendpoint in aws_test, fix tests
* change suitable type implementation
* fix the test for compatibility component
* change inmemory provider to include recordtype and use suitable type
* fix comments, CNAME should target hostname
* name mapper do not use pointer on struct
* txt prefix - just concatenate, remove spew, fix txt record label
* allow TXT records as result from dns provider
* add changelog
* fix tests
* TXT records need to be enclosed in double quotes
