Revert "Update POM version numbers to 5.0.0-rc2"

This reverts commit ceb3c487984ba48b210af85cfd97c65ed0f7a540.
Update last version number to 5.0.0-rc2
Deprecate classes in scifio-devel (in favor of loci.common.*)
Update classes in loci-legacy to include changes from ome.scifio.*
Change usage of ome.scifio.* to loci.common.*
Finish updating for ome.scifio.* deprecation
Update build system files to point to loci-common

loci-legacy and scifio-devel are now deprecated.
Update developer documentation to point to loci-common instead of scifio-devel
Move MetadataStore, MetadataRetrieve, and related classes to ome.xml.meta

This adds a dependency on loci-common to ome-xml; I would not expect
this to cause a problem.

Wrapper classes with the old package names are kept and are not
deprecated at the moment.  With the exception of MetadataRoot and
OMEXMLMetadataRoot (which were not present in 4.4.x), the old package names
are still used across the board.  For IFormatReader etc., we're going to have
to choose between using only the old package names and using only the new
package names - things like 'MetadataStore getMetadataStore()' mean that
deprecating current signatures and adding new signatures for the new classes
is not really possible.
Remove the 'native' component

This component was not built by default, and only contained the
deprecated bf-itk plugin.
Fix Maven source generation to use new package names
Fix test compile errors
Completely remove scifio-devel and any references to it

This component was never formally released, so remove it instead of
deprecating.
Remove loci-legacy component and references to it

This component was never formally released, and is replaced by
loci-common.
Remove classes and methods deprecated in 4.4.x
Move turbojpeg component to the forks directory
Rename the scifio-tools component to bio-formats-tools
Remove obsolete omeul scripts
Update variable names in command line tool scripts
Rename the loci-common component to common