Support ISO-8601 timestamp without brackets

[musicin3d]

Parser requires time to be in brackets. I'm assuming this is a convenient assumption. It makes it easy to find all the data, even if they contain spaces. However, AWS ELB logs use ISO-8601 format without brackets.

Example: 2019-06-29T12:40:00.547997Z

This is a very common, portable, and parsable date format. It should be supported with a new format field.

[musicin3d]

As a workaround, I'm using a parameterized note field to capture this and other unsupported fields. You have to read the source to see how this works.