changelog: update for post v0.0.4 changes
+2017-09-19: v0.0.5
+ 1.3.x protobuf support
+ cmd/msh: fixes and non-terminating detach (CTRL-P, Q)
+ lib/scheduler: refactor Revive/Suppress convenience APIs
+ lib/client,httpcli: ReponseClassNoData for empty response entities
+ lib/httpcli: drain HTTP response body when appropriate
+ lib/executor/calls: support Sender API
+ lib/httpcli/httpexec: initial revision
+ cmd/example-executor: refactor to use httpexec, Sender API
+
2017-09-13: v0.0.4
bumped protos to Mesos 1.2.x (v1 API only), with operator API support
api/v1/lib/... API refactoring (client, encoding, httpcli, recordio)
