Add function to parse previous text log file

[parmsam-pfizer]

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Adds `read_log_file() to read previous log object into list of tibbles object that you can more easily subset/filter. Addresses the first part of #162. Fixes #162.

[parmsam-pfizer]

Looks like one of the ubuntu failed checks are haven related.

[parmsam-pfizer]

Looks like the Ubuntu 3.6 image is also failing for this one now.

[bms63]

@parmsam-pfizer add yourself to the Description File!!

[bms63]

I was thinking more on the purpose of this update. We are trying to extract and parse the contents of the to do some sort of analysis.

read_log_file might be a bit misleading...what about extract_log_contents , parse_log_contents or something else??

[parmsam-pfizer]

The function is based on the name scheme used in readr. Maybe we can discuss alternate names at our next meeting. I'll work on the other edits in the meantime.

[parmsam-pfizer]

@nicholas-masel @bms63
Made changes based on our meeting earlier today. Please feel free to merge PR if it looks good. 🚀

[bms63]

LGTM! @nicholas-masel or @kodesiba any last words?!?