Get a system time offset from the Artsy servers
remove nsobject subclass on systemtime
Merge pull request #47 from orta/models

@laurabrown => Get a system time offset from the Artsy servers
JSON to Objects
Cleans up from #47.
Merge pull request #49 from AshFurrow/models

@1aurabrown => Cleans up from #47.
Merge remote-tracking branch 'artsy/master' into expanded_models

Conflicts:
	Kiosk/App/Models/SystemTime.swift
	KioskTests/Models/SystemTimeTests.swift
add more models, show full integration of HTTP -> JSON -> Models
add a space after :
Merge pull request #51 from orta/models1

@1aurabrown => add more models, show full integration of HTTP -> JSON -> Models
Revert "@1aurabrown => add more models, show full integration of HTTP -> JSON -> Models"
Merge pull request #54 from artsy/revert-51-models1

Revert "@1aurabrown => add more models, show full integration of HTTP ->...
Revert "Revert "@1aurabrown => add more models, show full integration of HTTP ->..."
Merge pull request #55 from artsy/revert-54-revert-51-models1

Revert "Revert "@1aurabrown => add more models, show full integration of...
add uibuttons