Added slide show plugin

# Please enter the commit message for your changes. Lines starting
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# On branch master
# Changes to be committed:
#   (use "git reset HEAD <file>..." to unstage)
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#	new file:   .idea/.name
#	new file:   .idea/encodings.xml
#	new file:   .idea/misc.xml
#	new file:   .idea/modules.xml
#	new file:   .idea/scopes/scope_settings.xml
#	new file:   .idea/tacoparty.iml
#	new file:   .idea/vcs.xml
#	new file:   .idea/workspace.xml
#	new file:   images/devinsombrero.gif
#	new file:   images/down-arrow.gif
#	modified:   index.html
#	modified:   styles/main.css
#