added generic duplicate exception
Added Atsumi::store__add($k, $v) and Atsumi::store__get($k) - useful if data needs to be available globally (although usually not the best idea!)
Merge branch 'master' of bitbucket.org:jimmyff/atsumi
added interpolation to the mvc_LocaleModel - might not be the best place for it though.
Merge branch 'master' of bitbucket.org:jimmyff/atsumi