Merge pull request #1 from lrodrigueza/master

merge #1
initial adding of transcript for testing and some code bug exploration.
combined first problems fromperson A with person B
my solution for Comm[#1] in parser.scm and the added transcript tests
added Comm[#2] person B GET-INDENT-AND-TOKENS, plus test transcript
added decimal-point support to GET-NUM in PY-READ, problem B[#3], plus utility functions DOT-SYMBOL? and DOT-CHAR?
merging after part 1
merge part one  Comm[#1,2], A[#3], B[#3], A[#4], A[#5], tested - merge seems to work, added transcript_person_a.txt to master, still needs confirmation from person A.
merge comm[#1,2],A[#3,4,5],B[#3]

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added negation support to py-primitives: B[#4] NEGATE-BOOL. added NEGATE method to py-bool object-class
python 'in' functionality added
added not in functionality to  handle-infix.
added WHILE loop functionallity - person b Comm[#6].
merge up until common-8, but without if