Update README.md
Fixes #283

https://github.com/couchbase/couchbase-lite-android/issues/283
Issue #287 - testChangeTrackerOneShot fails when run individually.

Fix by disabling the "non-mock" test, which has baked in expectations that depend on side effects of running other tests.  The test which uses a mock should work fine.

https://github.com/couchbase/couchbase-lite-android/issues/287
Document.purge() now returns void
Fixes #260 by porting collator changes over from iOS

Also, the collation tests were not passing in the string lengths, so tests were enhanced accordingly.

https://github.com/couchbase/couchbase-lite-android/issues/260
Merge pull request #290 from couchbase/feature/issue_260_numeric_query

Fixes #260 by porting collator changes over from iOS
update submodules
enabled test testPushUpdatedDocWithoutReSendingAttachments
Updated Attachments tests to validate that 'stub' and 'follows' properties don't both appear in attachments dicts
update submodules
Add doc comments to code for ResponderChain
added test for /couchbase-lite-java-core/issues/188 to ReplicationTest.java
update submodules
Merge pull request #293 from couchbase/feature/issue_188_java_core

fixes /couchbase-lite-java-core/issues/188
update submodules
Modify toString() to print out the hash code of the underlying sqlite db object.
Issue #245 update to Android Studio 0.5.7

https://github.com/couchbase/couchbase-lite-android/issues/245
update submodules
add test reproducing crash when concurrently calling Manager.getDatabase

Calling Manager.getDatabase() twice concurrently can cause:

java.lang.NullPointerException
            at com.couchbase.lite.android.AndroidSQLiteStorageEngine.execSQL(AndroidSQLiteStorageEngine.java:95)
            at com.couchbase.lite.Database.initialize(Database.java:888)
            at com.couchbase.lite.Database.open(Database.java:918)
            at com.couchbase.lite.Manager.getDatabase(Manager.java:229)
Merge pull request #297 from mjq/get_database_crash

Add test reproducing crash when concurrently calling Manager.getDatabase