-turbo and -include-asserts

[Charles]

In development, I added two new command line options:

-include-asserts[:no|yes] default is yes
Include assert statements in the program.

-turbo[:no|yes]
Maximum run-time performance.
This is a convenience for -contracts:none -include-asserts:no -include-tests:no -optimize

See http://cobra-language.com/source/ for the latest source.