updated project.properties for Netbeans 7.4
handle null values in filter forms correctly
add ability to filter by actor (movies only since it doesn't make as
much sense for TV shows)
make actor images on the movie details pages link to movies with the
same actor (fixes #55)
don't wrap actor thumbnails inside a link unless the link points
somewhere
fix Bootstrap snafu that broke the navbar when it's collapsed
(fixes #61)
make the actor name link to his/her IMDb page (or actually the search
result page since IMDb lacks an API)