Flexible parser using whitespace instead of a single tab

[leoheck]

Fix related to this discussion #41 (comment)

It accepts multiples white space (including the combination of tabs and spaces)

Sorry for the loooooong delay, I didn't see your answer before @SchrodingersGat

[leoheck]

I tested it really fast just changing the style from this section of the bom.ini found on your Readme.md it should be good to test more, I guess.

[REGEX_EXCLUDE]
; A series of regular expressions used to exclude parts from the BoM
; If a component matches ANY of these, it will be excluded from the BoM
; Column names are case-insensitive
; Format is: "ColumName	Regex" (tab-separated)
References    ^TP[0-9]*
References    ^FID
Part          mount.*hole
Part          solder.*bridge
Part          test.*point
Footprint     test.*point
Footprint     mount.*hole
Footprint     fiducial

[SchrodingersGat]

Thanks for the improvement @leoheck