Added tests and small fixes

src/zscanner/NOTES

src/zscanner/file_loader.c

src/zscanner/scanner_body.rl

src/zscanner/test/processing.c

src/zscanner/test/run_tests.sh

src/zscanner/test/tests/00_general.in

src/zscanner/test/tests/01_owner.in

src/zscanner/test/tests/01_owner.out

src/zscanner/test/tests/02_class.in

src/zscanner/test/tests/02_class.out

src/zscanner/test/tests/03_rrttl.in

src/zscanner/test/tests/03_rrttl.out

src/zscanner/test/tests/04_ORIGIN.in

src/zscanner/test/tests/05_TTL.in

src/zscanner/test/tests/06_INCLUDE.in

src/zscanner/test/tests/10_A.out

src/zscanner/test/tests/11_AAAA.out

src/zscanner/test/tests/12_TXT.out

src/zscanner/test/tests/13_SPF.in

src/zscanner/test/tests/13_SPF.out