Provide framework and implementation for some code metrics

[hopscc]

Provide access to some simple code metrics (LinesOfCode and simple
McCabe/Cyclomatic Complexity calculation) done by Cobra compiler driven from compiler commandline option.

Implement such that there is a reasonably accessible framework for adding additional metric calculations in the future.

See  Forum Discussion Utility of cobra compiler generating code metrics

[hopscc]

patch for enhancement supporting metrics.
Rel note and new tests

It should be relatively easy to add additional metrics calcs by augmenting MetricsGenerator for the calculation and CommandLine.cobra for a new metrics
suboption.

Note that this patch includes the code/patch from ticket:225 (multivalue cmdline options) as the metrics cmdline option uses/needs it.

In addition to the -metrics cmdline option theres a new '-parse' or '-p' or '-syntax' option that only runs the cobra frontend ( suppresses native code gen and native code compilation).
This is intended to be analogous to -c -compile and -r -run
(parse/compile/run)

Without this metrics will be calculated/generated as a side effect to compilation

cobra -metrics <filelist>

With it only metrics calculations (or any front end processing) can be done without the delay/overhead due to compilation (if all you want is the metrics info)

cobra -parse -metrics <filelist>

Additionally you can use it for a (front end only) syntax check run on your code....

cobra -syntax ACobraFile.cobra

[Chuck]

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