Eliminated Boolean Arguments From getNumberOfPassedChecks and getTotalNumberOfChecks

[vesk4000]

Closes #219.

Refactored a few methods in the CodeChecksResult class:

• getNumberOfPassedChecks() is now getWeightedNumberOfPassedChecks();
• removed getNumberOfPassedChecks(boolean includeWeight);
• added getUnweightedNumberOfPassedChecks();
• getTotalNumberOfChecks() is now getTotalWeightedNumberOfChecks();
• removed getTotalNumberOfChecks(boolean includeWeight);
• added getTotalUnweightedNumberOfChecks().

Fixed the method calls, of course, and the behaviour is exactly the same. I wasn't sure if I should refactor getTotalNumberOfChecks, in addition to getNumberOfPassedChecks, but I did anyway, since it seemed sensible.