Fix redundant directory structure
Update test for renamed morph definition file
Set up and integrate a Maven/Tycho build for the Metatext projects
Add a p2 repository to install the Metatext editor in Eclipse

After a `mvn clean install` you can install the editor into an
Eclipse instance from the local p2 archive: in Eclipse, choose
'Help' -> 'Install New Software' -> 'Add...' -> 'Archive...' and
select the 'org.lobid.metatext.p2.zip' file from the 'target'
directory of the 'org.lobid.metatext.p2' project.