Merge pull request #146 from derrh/master

new afnetworking causes issues in icanvas
updated podspec for new version
Adding support for multiple submissions within a Submission Record

Also adding rubricAssessments and networking code for CKISubmissions/CKISubmissionComments and CKISubmissionRecords
Merge pull request #147 from bpluim/CKISubmissionRecord

Adding support for multiple submissions within a Submission Record
Adding CanvasKit 0.6.0
Merge pull request #148 from bpluim/CKISubmissionRecord

Adding CanvasKit 0.6.0
Merge remote-tracking branch 'instructure/CanvasKit/master'

Conflicts:
	CanvasKit.podspec