CSCGLOBAL: Support TXT records that are long or include double-quotes (#1631)
CSCGLOBAL: Support TXT records that are long or include double-quotes (#1631)

* Remove TXT restrictions around length

* Improve get-zones "js" format.

New:

```
$ dnscontrol get-zone --format js providercredkey - stackoverflow.co.il
var DSP_PROVIDERCREDKEY = NewDnsProvider("providercredkey");
var REG_CHANGEME = NewRegistrar("none");
D("stackoverflow.co.il", REG_CHANGEME,
	DnsProvider(DSP_PROVIDERCREDKEY),
	DefaultTTL(14400),
	A('www', '165.160.15.20'),
	...
	...
	...
	...
	//NAMESERVER('dns1.cscdns.net.'),
	//NAMESERVER('dns2.cscdns.net.')
)
```

* Update test data
StackExchange/dnscontrol,StackExchange/dnscontrol,StackExchange/dnscontrol