Bump to latest versions for Docker

Dockerfile

-FROM ubuntu:14.04.1
+FROM ubuntu:14.04.2
 
 ## Environment setup
 ENV HOME /root
@@ -12,22 +12,22 @@ ENV DEBIAN_FRONTEND noninteractive
 RUN apt-get update && apt-get upgrade -y
 RUN apt-get install -y git mercurial build-essential software-properties-common wget pkg-config libgmp3-dev libreadline6-dev libpcre3-dev libpcre++-dev
 
-## Install Qt5.4 (not required for CLI)
-# RUN add-apt-repository ppa:beineri/opt-qt54-trusty -y
+## Install Qt5.4.1 (not required for CLI)
+# RUN add-apt-repository ppa:beineri/opt-qt541-trusty -y
 # RUN apt-get update -y
 # RUN apt-get install -y qt54quickcontrols qt54webengine mesa-common-dev libglu1-mesa-dev
 # ENV PKG_CONFIG_PATH /opt/qt54/lib/pkgconfig
 
 # Install Golang
-RUN wget https://storage.googleapis.com/golang/go1.4.1.linux-amd64.tar.gz
+RUN wget https://storage.googleapis.com/golang/go1.4.2.linux-amd64.tar.gz
 RUN tar -C /usr/local -xzf go*.tar.gz && go version
 
 # this is a workaround, to make sure that docker's cache is invalidated whenever the git repo changes
 ADD https://api.github.com/repos/ethereum/go-ethereum/git/refs/heads/develop file_does_not_exist
 
 ## Fetch and install go-ethereum
-RUN go get -v github.com/tools/godep
-RUN go get -v -d github.com/ethereum/go-ethereum/...
+RUN go get github.com/tools/godep
+RUN go get -d github.com/ethereum/go-ethereum/...
 WORKDIR $GOPATH/src/github.com/ethereum/go-ethereum
 RUN git checkout develop
 RUN godep restore