Merge branch 'feature/validator'

configure.ac

sefht.geany

src/lib/Makefile.am

src/lib/sefht/node_fragment.c

src/lib/sefht/validator.c

src/lib/sefht/validator.h

src/lib/sefht/validator_tag.c

src/lib/sefht/validator_tag.h

tests/Makefile.am

tests/test_node_fragment.c

tests/test_validator.c

todo.txt