Add base64, uuencode, ascii85, binhex
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Flow control is too complicated now. Need to package so as to make it comprehensible.
Also check memory usage with valgrind.
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Need to finish adding HDML support to ascii2uni.
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Add to web page and documentation explanation of the relationship between these
programs and encoding converters.
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Need to add to u2a.tcl a means of entering custom substitutions and deletions.
The code for writing them out once they are on the lists is already in place.

uni2ascii has a new and better action summary, now commented out.
Need to modify u2a to handle it.






