Merge branch 'master' into OP_MSG

# Conflicts:
#	lib/mongo.ex

Author: zookzook

.travis.yml

@@ -6,6 +6,7 @@ elixir:
   - 1.5
   - 1.6
   - 1.7
+  - 1.8
 
 cache:
   - apt
@@ -29,7 +30,7 @@ before_script:
 
 script:
   - mix test
-  - not_allowed=(1.3 1.4 1.5 1.6 1.7)
+  - not_allowed=(1.3 1.4 1.5 1.6 1.7 1.8)
   - case "${not_allowed[@]}" in  *"${TRAVIS_ELIXIR_VERSION}"*) dialyzer=0 ;; *) dialyzer=1 ;; esac
   - if [ "$dialyzer" -eq 1 ]; then mix dialyzer --halt-exit-status; fi
 

CHANGELOG.md

@@ -1,11 +1,13 @@
-## v0.5.0-dev
+## v0.5.1
 
 * Enhancements
   * upgraded to DBConnection 2.0.6
   * refactored code, simplified code and api
   * replaced deprecated op_code by database commands
   * update_one, update_many, replace_one, replace_many return upserted ids
   * support for all find options
+  * Support for MongoDB 3.6 collection [Change Streams](https://docs.mongodb.com/manual/changeStreams/)
+  * Support for SCRAM-SHA-256 (MongoDB 4.x)
 
 ## v0.4.8-dev
 

README.md

@@ -19,11 +19,15 @@ to implement the current requirements for the driver.
 ## Motivation
 
   * [ ] Refactoring old code into new
-  * [ ] Understand the magic in the code
   * [x] Simplify code: remove raw_find (raw_find called from cursors, raw_find called with "$cmd"), so raw_find is more calling a command than a find query.
   * [x] Better support for new MongoDB version, for example the ability to use views
   * [x] Upgrade to ([DBConnection 2.x](https://github.com/elixir-ecto/db_connection))
   * [x] Removed depreacated op codes ([See](https://docs.mongodb.com/manual/reference/mongodb-wire-protocol/#request-opcodes))
+  * [x] Support for SCRAM-SHA-256 (MongoDB 4.x)
+  * [x] Support for change streaming api ([See](https://github.com/mongodb/specifications/blob/master/source/change-streams/change-streams.rst))
+  * [ ] Add `op_msg` support ([See](https://docs.mongodb.com/manual/reference/mongodb-wire-protocol/#op-msg))
+  * [ ] driver sessions ([See](https://github.com/mongodb/specifications/blob/master/source/sessions/driver-sessions.rst))
+  * [ ] driver transactions ([See](https://github.com/mongodb/specifications/blob/master/source/transactions/transactions.rst)) 
   * [ ] Because the driver is used in production environments, quick adjustments are necessary.
 
 ## Features