SBT projects naming & organization adjusted for proper publishing
Switch to slf4j-api as a dependency.

As noted in SLJ4j documentation, library projects should not declare a dependency on any binding such as "simple" binding, but should depend only on api. So it will not conflict with a binding in user project.

Also updated slf4j version.
Use short project name for SBT and prefixed names for publishing
Merge pull request #1 from alex-vv/sbt-publishing-fixes

SBT projects naming & organization adjusted for proper publishing
Merge pull request #2 from alex-vv/slf4j-api

Switch to slf4j-api as a dependency.