Merge pull request #20 from VladislavPovedyuk/meetings

Meetings
fixed ooops
preparations for heroku
pg gem
db.yml changes
pics
stylesheet link tag
changes to application.css
...
fix
seeds
Merge pull request #22 from VladislavPovedyuk/heroku

Heroku
doctors label and clean public
Merge pull request #21 from VladislavPovedyuk/dev

Dev
meeting functionality
 removed public