add ANAME support to DnsMadeEasy (ALIAS == ANAME)

[yzguy]

Adds requested feature from #304

This maps an OctoDNS ALIAS record to DnsMadeEasy's ANAME record. In looking at their ANAME support, they allow IP addresses as values for ANAME records, which seems silly as then it's just an A record at that point, so I did not handle that case, if it's common enough I guess we could.

Example OctoDNS config

---
? ''
: - ttl: 1800
    type: ALIAS
    value: www.example.com.
  - type: MX

OctoDNS will dump all ANAME records to being ALIAS records
OctoDNS will apply all ALIAS records as being ANAME records

/cc @fahanson

[ross]

Geneally 👍, I'd recommend peaking at https://github.com/github/octodns/pull/305/files as I just ran into a problem with CloudflareProvider that I'd bet will happen here now with the translated type.

[yzguy]

Refactored, fixed the update issue.

I handled the same issue in the DnsMadeEasyClient, it transforms all ANAME's to ALIAS, and then before creating changing ALIAS to ANAME. Pretty clean, there's kind of a loop for fixing record weirdness (relative versus absolute)