Several changes to make talk proposal system ready for 2014

Signed-off-by: Fernando Rocha <fernandogrd@gmail.com>
Fixes on 2014 layout for talk propostals
Link to proposal at menu and fix at extra_speakers
Submit proposal link to proposal page

Signed-off-by: Fernando Rocha <fernandogrd@gmail.com>
Merge branch 'adjust_proposals'
s/8/10

Signed-off-by: Fernando Rocha <fernandogrd@gmail.com>