Add support for 32- and 64-bit checksums
Tests against SMhasher were successful for both the 32- and 64-bit version, except for the small key speed test. test_results_b47ad78c_32bit.txttest_results_061162a3_64bit.txt
Tests against SMhasher were successful for both the 32- and 64-bit version, except for the small key speed test. test_results_b47ad78c_32bit.txttest_results_061162a3_64bit.txt