change "add a post" to "contribute"

Signed-off-by: Erica <e@energy7.com>
change map width to 697px to fill column

Signed-off-by: Erica <e@energy7.com>
rearrange event page

Signed-off-by: Erica <e@energy7.com>
style related events, footer widget

Signed-off-by: Erica <e@energy7.com>