adds rails
adds authors
adds tags
adds taggings and taggable

via taggings tags can be connected to taggable entities
removes keywords from tags
introduces taggable with tag method
makes author tagable
ignores development sqlite db
extracts 'taggable' into active record extension
moves save from tag method

so if needed save can be called later
adds poems and stories
adds haml gem
adds dummy arts index
displays list of arts
adds art details display
simple ui improvements
adds seeds
fixes typo in metaphor
adds header to content section