Support PATCH.
Merge branch 'master' into patch-method

Conflicts:
	lib/runtime/entity/empty.dart
	lib/runtime/entity/wrapper.dart
Clarifying comment in _patch for treatment of arrays.
Merge pull request #119 from alxhub/patch-method

Support sending updates as patches.
unsolo test group
Fix typo in wrapper.dart
Transaction API fixes and an end-to-end-ish test
Merge pull request #121 from yjbanov/transaction-api-rebase

Transaction API fixes and an end-to-end-ish test
Fixes for Dart SDK 0.8.10.8
Merge pull request #122 from yjbanov/fixes-for-dart-sdk-0.8.10.8

Fixes for Dart SDK 0.8.10.8
Provide simple implementations for RequestHandler and StreamyHttpService for browser and server/command-line apps
Docs and minor API fixes to impls
Use Source.RPC constant instead of a string literal
Add 5-minute tutorial to README.md
README: features, reinstate experimental status, other minor fixes
Handle illegal identifier characters that can appear in discovery docs
Don't accept trace events when the controller has already been closed.
Merge pull request #125 from alxhub/fix-tracing

Don't accept trace events when the controller has already been closed.
Merge pull request #124 from yjbanov/properties-with-illegal-chars

Handle illegal identifier characters that can appear in discovery docs
Add build status badge