getNewAddresses generates incorrect addresses

[todofixthis]

Using PyOTA:

In [1]: import iota

In [2]: iota.__version__
Out[2]: '1.0.0b4'

In [3]: api = iota.Iota('http://localhost:14265', b'TESTVALUE9DONTUSEINPRODUCTION99999QANDEFBGD9SHSHDBWCDFT9B9YDMAABCCXBXHAFUEPEIBAHW')

In [4]: api.get_new_addresses(index=0, count=1)
Out[4]: [Address(b'ASBXGZKCSBKKLGYSRAILPVJZOMRFYZWBCYJRIVNWKRPAMEVSVANUVZS9J9CMTXVWTVNAYDRBKVXLAISYK')]

Using JS lib:

> var IOTA = require('iota.lib.js');
undefined
> var iota = new IOTA();
undefined
> iota.api.getNewAddress('TESTVALUE9DONTUSEINPRODUCTION99999QANDEFBGD9SHSHDBWCDFT9B9YDMAABCCXBXHAFUEPEIBAHW', {'index':0, 'total':1}, function(error, addresses) { if(error){ console.error(error); } else { console.log(addresses); }});
[ 'NRQOZF9LIKZUZNJWPFLVDULBEJEX9CPSWMFHJFJIYCEQORTERJLEACIIYKZWJJVQXETK9UDFY99SCF9XL' ]
undefined

[todofixthis]

This occurs because PrivateKey.get_digest_trits returns the wrong value when the key is longer than 1 fragment:

PyOTA:

> from iota import TryteString
> from iota.crypto.signing import KeyGenerator
> kg = KeyGenerator(b'TESTVALUE9DONTUSEINPRODUCTION99999QANDEFBGD9SHSHDBWCDFT9B9YDMAABCCXBXHAFUEPEIBAHW')
> key = kg.get_keys(0, iterations=2)[0]
> digest = TryteString.from_trits(key.get_digest_trits())
> digest
TryteString(b'XCLECABPSBFYWJQNKXJAHB9QPJLAIJJBFUQNGUWDNVCVFQWXECVLYXUYHKW9XQECWCIVNEDMSJWL9PDEQ999999999999999999999999999999999999999999999999999999999999999999999999999999999')

JS:

> var Signing = require('iota.lib.js/lib/crypto/signing.js');
> var Converter = require('iota.lib.js/lib/crypto/converter.js');
> var key = Signing.key(Converter.trits('TESTVALUE9DONTUSEINPRODUCTION99999QANDEFBGD9SHSHDBWCDFT9B9YDMAABCCXBXHAFUEPEIBAHW'), 0, 2)
> var digests = Signing.digests(key);
> Converter.trytes(digests)
'XCLECABPSBFYWJQNKXJAHB9QPJLAIJJBFUQNGUWDNVCVFQWXECVLYXUYHKW9XQECWCIVNEDMSJWL9PDEQGVKTYZQXPAMHIJGJXQIJJRSLPCVNAUUYJSIDOHYXUNDQYVBPYDDEZMFJQRAIMPVATMWLFHJXAISQTQYWX'

[todofixthis]

Issue identified and fixed. Checking for regressions now; will commit changes shortly.