Code Refactor; Delegate Methods; File Processing

Refactored all code in the iCloud target. Code has been updated to
modern Objective-C Syntax (instancetype, properties, literal
conversion, subscripting, etc.). Added two new delegate methods,
iCloudFileUpdateDidBegin, and iCloudFileUpdateDidEnd. Resolved issues
with internal file processing. Minimum deployment version is now iOS
6.0.
Query Update Notifications; Storyboard Fixes

NSMetadataQueryDidUpdateNotification is now available again. When the
system sends an update notification, the iCloud files will update and
appropriate delegate methods will be called. Updated storyboards.
Code Updates; Documentation Build

Added dealloc method to iCloud for cleanup. Fixed initialization issues
with iCloudDocument. Deprecated getListOfCloudFiles, use listCloudFiles
instead. Fixed integer comparison issues in ARM-64. Updated some strong
properties to copy.
Merge pull request #51 from iRareMedia/feature

7.3 Update
Readme Update; License Update

Updated Readme installation instructions. Improved setup instructions.
License now reflects correct copyright year and is clearer. Removed
CHANGELOG.md because a full change log is available in the GitHub
releases page and using the commit history.
Cocoapod Spec; Header Update; Readme

Added Cocoapod Spec file. Full Cocoapod support available soon. Updated
the header file import statement. Tweaked a few things in the Readme.
Merge pull request #52 from iRareMedia/release

Version 7.3