Headers to use '"' instead of '='
Made '-exclusive' switch work in all situaltions

Added the crunch#CaptureArgs() to capture the range, and arguments
when calling CrunchLine or CrunchBlock. The capered range then could be
used to correctly set the stopline for the backward search in the
GetVaraibleValue() function.

Also cleaned up various parts of the code, as well as  the crunchLine017 tests