update ubuntu install script

scripts/install_sdk_ubuntu.sh

@@ -3,27 +3,24 @@
 # XXX: this script is intended to be run from
 # a fresh Digital Ocean droplet with Ubuntu
 
-# upon its completion, you must either reset
-# your terminal or run `source ~/.profile`
-
 # change this to a specific release or branch
-BRANCH=master
+BRANCH=v0.26.0
 
 sudo apt-get update -y
 sudo apt-get upgrade -y
 sudo apt-get install -y make
 
 # get and unpack golang
-curl -O https://storage.googleapis.com/golang/go1.10.linux-amd64.tar.gz
-tar -xvf go1.10.linux-amd64.tar.gz
+curl -O https://dl.google.com/go/go1.11.2.linux-amd64.tar.gz
+tar -xvf go1.11.2.linux-amd64.tar.gz
 
 # move go binary and add to path
 mv go /usr/local
 echo "export PATH=\$PATH:/usr/local/go/bin" >> ~/.profile
 
-# create the goApps directory, set GOPATH, and put it on PATH
-mkdir goApps
-echo "export GOPATH=/root/goApps" >> ~/.profile
+# create the go directory, set GOPATH, and put it on PATH
+mkdir go
+echo "export GOPATH=/root/go" >> ~/.profile
 echo "export PATH=\$PATH:\$GOPATH/bin" >> ~/.profile
 
 source ~/.profile
@@ -35,7 +32,8 @@ cd $GOPATH/src/$REPO
 
 # build & install master
 git checkout $BRANCH
-make get_tools
-make get_vendor_deps
-make install
-make install_examples
+LEDGER_ENABLED=false make get_tools
+LEDGER_ENABLED=false make get_vendor_deps
+LEDGER_ENABLED=false make install
+
+source ~/.profile