Ignore empty lines (whitespace) at the beginning of yaml files

[cfbenn]

Request:

It appears that MPF looks for "#config_version=5" on the very first line. If it is on the second line (after a crlf) it will throw the following error:

AssertionError: Version mismatch. Expected: #config_version=5 Actual: Files: [file path]

Ignoring leading white space should fix this.

[jabdoa2]

I don't think this is a very good idea. Why do you want this exactly?

[cfbenn]

Various times I have added in a leading CRLF and it has caused a runtime issue. I assumed since leading space/crlf's aren't really valid, they could be stripped to make the YAML a little more forgiving.