CleanupStream takes input and output string channels, and feeds output with pipe delimited strings with original name on the left and cleaned up name on the right from the pipe.

Preprocess runs a series of regular expressions over the input to determine features of the input before parsing.

StripTags takes a slice of bytes and returns a string with common tags removed and html entities escaped.

UnderscoreToSpace takes a slice of bytes.

CleanupResult keeps results of removal of some HTML tags.

Preprocessor structure keeps state of the preprocessor results.