Fixed scifio-tools pom.xml

* Updated version to 4.5-SNAPSHOT
* Corrected typo in groupId tag
* Changed dependency from loci-common to loci-legacy (loci-common is an
  empty pom project that exists for backwards compatibility)
* Added scifio-tools to top-level pom.xml so it will be included on
  top-level maven commands and imports.
Merge pull request #440 from hinerm/scifio-tools-pom

Fixed scifio-tools pom.xml