Allow space-separated entry by default

[rthedin]

Issue pointed out on the forums: https://forums.nrel.gov/t/the-rotorapexoffsetpos-array-was-not-assigned-valid-real-values-on-line-59-issue-with-openfast-toolbox/8616

The issue is reproducible and is occurring with entry RotorApexOffsetPos that has 3 components. Only the first one is being read since by default the toolbox is not accepting space-separated entries:

openfast_toolbox/openfast_toolbox/io/fast_input_file.py

Line 475 in 2553643

allowSpaceSeparatedList=False

This PR changes that behavior, even though I'm not directly changing the variable allowSpaceSeparatedList in the line above. Now, for every line, we read as many space-separated consecutive scalars and bools as possible. Strings are still only read once. The prior implementation only read two integers when allowSpaceSeparatedList is set to True:

openfast_toolbox/openfast_toolbox/io/fast_input_file.py

Lines 1240 to 1242 in 2553643

	if allowSpaceSeparatedList and len(splits)>1:
	if strIsInt(splits[1]):
	d['value']=splits[0]+ ' '+splits[1]

Such restriction is now lifted.

The goal with the change is that when the user reads a file using f = FASTInputFile('my_openfast_input.dat') and then writes it again with f.write('my_openfast_input_mod.dat'), no changes are introduced.

There is one detail:
Now when the user specifies extra inputs because he/she knows OpenFAST will not read them, e.g. 2 3 WindType <comments>, then the toolbox will in fact read both and re-write them as 2, 3 WindType <comments>. The new written file will still be read by OpenFAST normally, only taking into account the first value. However, some processing scripts might have checks like f['WindType']==2 and that would fail.