add image speeches per period
Merge branch 'master' of https://github.com/DHLeipzig-CurrentTopics-SS2014/openLegislature
Merge branch 'master' of https://github.com/DHLeipzig-CurrentTopics-SS2014/openLegislature

# Please enter a commit message to explain why this merge is necessary,
# especially if it merges an updated upstream into a topic branch.
#
# Lines starting with '#' will be ignored, and an empty message aborts
# the commit.
add img for metadatabase