Cppcheck can now analyse source files that are UTF-16 encoded

Faster checking. Some projects, for instance sqlite, is much quicker now. The difference when checking other projects is not big.

Removed deprecated command line options -s, --style, -a, --all, --auto-dealloc, --test-2-pass.

Improved C code analysis. Better analysis of unknown types etc.

New check: comparison of modulo results that are always true/false. For instance: if (x % 5 == 5)

Improved checks to detect more bugs: * improved array index out of bounds (#3893, #3907) * improved double deallocation (#3895) * delete non-dynamic memory (#1773) * missing break in switch (#3794) * member variable not initialized (#3801) * improved checking of format string parameters * improved 64-bit portability when returning pointer/int