if statements

Changed:
if check on vals now return true if the value has a string value
%val = "test me" if(%val) will now return true since %val is not null

Script side:
string checks for "true" and "false" will now be parsed as integer values of 1 and 0.

TEST VIGOUROUSLY

Engine/source/console/torquescript/compiledEval.cpp

@@ -1144,6 +1144,7 @@ Con::EvalResult CodeBlock::exec(U32 ip, const char* functionName, Namespace* thi
             ip++;
             break;
          }
+
          ip = code[ip];
          break;
       case OP_JMPIFF: