change contact us text and add link to google groups
improve whoisinvarnalab widget
add calendar to landing page
Merge pull request #67 from VarnaLab/feature/calendar

add calendar to landing page
Merge pull request #66 from VarnaLab/improve/whoisinlab_widget

improve whoisinvarnalab widget
Merge pull request #65 from VarnaLab/improve/contact_us_widget

contact_us widget
0.0.17 release