Merge pull request #13 from flyingice/master

DB model update + UI update
Version 15
Merge pull request #14 from flyingice/master

sending mail confirmation for subscription
Merge remote-tracking branch 'upstream/master'
Version 16

Fix slogan
Merge pull request #15 from flyingice/master

update mail template
Merge pull request #16 from michaelzzm/master

Version 16