CB-6500 - Cordova requires arm64 architecture.

Removes the conditional arches in CordovaLib, and removes VALID_ARCHS (relies on default).
CB-6491 add CONTRIBUTING.md
CB-6553: added top-level package.json file
CB-6578 - Fix CordovaLibTests not building
CB-6580 - CDVWhitelistTests are failing
CB-6579 - CDVWebViewDelegateTests are failing
CB-6638 - Convert CordovaLibTests to XCTests
Update package.json version to 3.5.0
Updated version to 3.5.0
Updated RELEASENOTES for 3.5.0
Set VERSION to 3.6.0-dev (via coho)
Update JS snapshot to version 3.6.0-dev (via coho)
CB-5651 - [iOS] make visible the version of the Cordova native lib
CB-6729 - Update printDeprecationNotice to new name, and new warning for iOS < 6.0
CB-6785 Add license to CONTRIBUTING.md
Fix minor grammar in CDVLocalStorage iCloud warning.
CB-6997 - Deprecate obsolete CDVPlugin methods
CB-6998 - Remove CDVCommandDelegate::execute deprecated call (deprecated since 2.2)
CB-6579 - update deprecation to use CDV_DEPRECATED macro
Remove LICENSE entries for files that we no longer use