Update new line handling

[Teatabler]

In line 560, in my opinion, Chr(10) is better than vbCrLf.

559      Case "n"
560           json_BufferAppend json_buffer, vbCrLf, json_BufferPosition, json_BufferLength
561           json_Index = json_Index + 1

[timhall]

Related: VBA-tools/VBA-Web#270

[omegastripes]

I converted the sample {"text":"abc\r\ndef"} to object with ParseJson, then converted it to string with ConvertToJson, returned string is { "text": "abc\r\r\ndef" }
Seems ConvertToJson duplicates \r within strings.

[timhall]

A little more activity on #67 closing in favor of that.