i-bem-node init and tests
Merge pull request #152 from delfrrr/vbilonenko.i-bem-node-init-and-tests

i-bem-node .init() and tests
exit test on fail with correct code
fix i-ajax.js test
Merge pull request #155 from delfrrr/delfrrr.check-fail

exit test.sh on fail with correct code
i-errors
Merge pull request #154 from delfrrr/delfrrr.i-errors

Better way to handle custom errors
replace i-ycssjs with enb-middleware