[Bugfix] Conference methods related to weeks now database independent
Merge pull request #268 from ChrisBr/bugfix_db_week

[Bugfix] Conference methods related to weeks now database independent
User/Person models merge
houndci fixes
fix biography field as text, not string
hound fixes
style fixes
fix in parameters
Merge pull request #262 from differentreality/final_user_model

User/Person models merge
Merge pull request #277 from differentreality/wip_registration_fix

fix in parameters
Adds instagram url to conference
Adds instagram fontawesome icon to splash and reverting the description for slideshare & speakerdeck to have media ids instead of link

Adds test for instagram url to conference show