Dealing with missing fields

[3droj7]

When there's a table that missing a field, it skips over the field and puts inside the value of the second field instead.

The missing field's value should be None.
Right now it gives it values of other fields (that are not missing)

(For example, the table from https://en.wikipedia.org/wiki/Comparison_of_instruction_set_architectures)

[bcicen]

Fix for handling empty/whitespace fields pushed in 4216072 and now included in the latest release