Added new methods to COScope for all permissions

- grantAllPermissions
- initWithAllPermissions
+ scopeAllPermissions
Exposed cancel method of COUpload in COCopyClient

Added a new internal property for a COUpload object named
currentUpload. Can cancel this upload by using the new
-cancelCurrentUpload method of COCopyClient. This only works if you are
using a special added method -cancellableUploadFromPath:...
Ignoring changes to DMViewController
GitIgnore
Merge pull request #1 from justinxxvii/master

Added new methods to COScope for all permissions