Update README.md
Added some code-coverage testing to CBLCollateJSON & fixed test holes
Fix for replication never going idle after checkpoint-save conflict

Fixes #128
Updated MYUtilities
Replications created by -replicateWithURL:exclusively: should be continuous
Added Base64 conversion methods to CBLJSON class.

Fixes #129
Support for 64-bit iOS

NOT TESTED YET! But the iOS frameworks now include 64-bit binaries.
A side effect of this is that I had to bump the minimum supported iOS
version from 5.0 to 6.0, which for some reason is a prerequisite for
enabling 64-bit.
Fixes #130
Fix Xcode 4 build by making the 64-bit iOS setting only apply to iOS 7.
Stub out the route handlers for sessions
JavaScriptCore is available in iOS7
Adding in some rudimentary cookie parsing
Need to use the PLATFORM_NAME as a const to get this to build to the simulator in a subproject
Lots of the auth, session, cookie workflow in place
Working GET/DELETE/POST _sessions
Use intValue to prevent precision loss