Release v0.5.0

Dockerfile

@@ -2,7 +2,7 @@ FROM alpine:edge
 ENTRYPOINT ["/bin/matterbridge"]
 
 COPY . /go/src/github.com/42wim/matterbridge
-RUN apk update && apk add go git \
+RUN apk update && apk add go git gcc musl-dev \
         && cd /go/src/github.com/42wim/matterbridge \
         && export GOPATH=/go \
         && go get \

README.md

@@ -19,7 +19,7 @@ Breaking changes for matterbridge can be found in [migration](https://github.com
 * A dedicated user(bot) on your mattermost instance.
 
 ## binaries
-Binaries can be found [here] (https://github.com/42wim/matterbridge/releases/tag/v0.5-beta2)
+Binaries can be found [here] (https://github.com/42wim/matterbridge/releases/tag/v0.5.0)
 
 ## building
 Go 1.6+ is required. Make sure you have [Go](https://golang.org/doc/install) properly installed, including setting up your [GOPATH] (https://golang.org/doc/code.html#GOPATH)