Added lexemeId field to Visual table so that it will know what image to load for a definition. Now, when a new image is uploaded, it asks to fill in the matching word and afterwards it shows the tagging page. The matching word can be modified at any time.

git-svn-id: http://voronet.francu.com/repos/DEX@967 8d550267-2627-4c68-899f-85492a8dd5ca