改摘要, request by sponsor

Conflicts:
	2013/speakers.php
Merge branch 'develop' into release/2013
ericsk 兩個議程是一樣內容, requesy by ericsk
irc log update
Merge branch 'release/2013' of github.com:MOPCON/MOPCON into release/2013
Merge remote-tracking branch 'origin/release/2013' into develop