Added dependency on slf4j-api.
Added dependency on slf4j-api.

git-svn-id: 0b4459c4d84e8272c13baf44ddcd20899f1da4b0@8528 983b779f-54db-0310-a2f8-e46c051b0de2

zepheira/babel,zepheira/babel,zepheira/babel