working linux makefile

when building develop branch, checkout of eth-go develop branch is required

Makefile

 UNAME = $(shell uname)
+FILES=qml *.png
+GOPATH=$(PWD)
+
 
 # Default is building
 all:
-	go install
+	go get -d
+	cp *.go $(GOPATH)/src/github.com/ethereum/go-ethereum
+	cp -r ui $(GOPATH)/src/github.com/ethereum/go-ethereum
+	go build
 
 install:
 # Linux build
 ifeq ($(UNAME),Linux)
-	mkdir /usr/local/ethereal
-	files=(wallet.qml net.png network.png new.png tx.png)
-	for file in "${files[@]}"; do
-		cp $file /usr/share/ethereal
+	mkdir -p /usr/share/ethereal
+	for file in $(FILES); do \
+		cp -r $$file /usr/share/ethereal; \
 	done
-	cp $GOPATH/bin/go-ethereum /usr/local/bin/ethereal
+	cp go-ethereum /usr/local/bin/ethereal
 endif
 # OS X build
 ifeq ($(UNAME),Darwin)