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.
Tiny tweak to JSON collator
Implemented full-text search using SQLite's FTS4 extension.
FTS: Don't return text as key; it's now a separate .fullText property
FTS: Added API to get the match range(s) in the text.
FTS: Added support for snippets in the query rows.
FTS: Query results should be restricted to those from the view being queried!
FTS: Ranked sorting; header refactoring

* Implemented sorting by ranking (can be turned off for speed)
* Order and limit options honored
* Split FTS stuff out into CBLQuery+FullTextSearch
FTS: Text keys now denoted by CBLTextKey() rather than a special dictionary.
FTS: Improved language support by integrating Unicode Snowball tokenizer

Tokenizer from <https://github.com/illarionov/sqlite3-unicodesn>.
Supports Unicode, and stemming for many European languages plus Russian
and Turkish (see full list in file modules_utf8.txt)
working toward geo
begin running tests
first geo test is passing