Expose bioformats_package on the Bio-Formats downloads page

- Promote the new bioformats_package.jar on the main downloads page
- Move the deprecated loci_tools.jar to the components section
- Use new icons for the tools downloads
Order artifacts alphabetically
Add javadocs zip to the Bio-Formats downloads page

- Create API documentation section similar to OMERO downloads page
Use bioformats_package instead of loci_tools for the renaming example
Replace Bio-Formats Package JAR icon
Merge pull request #50 from sbesson/rebased/develop/bioformats_package

Add new JAR to Bio-Formats downloads page (rebased onto develop)