FEATURE: Add ability to ignore chunks of comments

[hjmjohnson]

In ITK there are many spelling words added to the dictionary to deal with ASCII art:

Like adding the words

oooooooooooo
oXooooooooooooooooooo

to deal with ASCII art

https://github.com/InsightSoftwareConsortium/ITK/blob/7ca2f0e73e84fd0563b80061d31b1c7f97bea23c/Modules/Numerics/Statistics/test/itkSpatialNeighborSubsamplerTest.cxx#L38

InsightSoftwareConsortium/ITK#5475 (comment)

PROPOSAL 1:

Add a file separate from the main dictionary to describe per-file-pattern spelling exceptions.

# per_file_dictionary_excptions.txt
# allowed words.             : regex for file pattern matching... ".*' is the default if not specified
oooooooooooo               : '.*SpatialNeighborSubsampler.*'
oXooooooooooooooooooo :  '.*SpatialNeighborSubsampler.*'

PROPOSAL 2:

Have in code spelling checking disable/enable as comments

// spell-check : OFF
// spell-check : ON

[hjmjohnson]

@dave3d This is a proposal that would allow for a main dictionary that is compatible with many tools (i.e. ispell, ide's) and an auxiliary dictionary that provides per-file exceptions for the pull-requests.

I don't think there is a great solution to all the issues related to automated spell checking.

[dave3d]

I like the 2nd proposal. I've thought about doing something like that but didn't really have the time/motivation.

[hjmjohnson]

Resolved in #70