added codedb plugin
add codedb.tests fragment
remove dependency on backend
move classes to codedb and backend plugins
update tests and fix errors
rename RuntimeInfoManagerData to R_I_CatalogData
rename codedb to model
renamed model packages
reorganize packages
improve runtime provider access
move extension points to more appropriate plug-ins
rename common plugin to util; create util_eclipse
update r101 file
move utilities classes to util_eclipse plugin
merge model refactoring branch