major fixes

* adding fn to process a message (i.e., ASCII string)
* fixing numerous bugs in parity error detection
* adding/updating unit tests
-dead code
-dead code
whacking Message class

* to thin of a wrapper around an array of arrays
comments
flipBit fn now using switch stmt

* simpler than the group of if stmts
rename fn
inlining convertASCIIToMessageSegments fn
simplifying code for setParityBits fn
renaming vars and adding comments in encodeASCIIString fn