Disable host key checking, upgrade Stack

For some reason Ubuntu ships a super old version which doesn't even
work because of a bug that was fixed a long time ago?? Thanks guys...

scripts/deploy.bash

@@ -15,4 +15,5 @@ else
     exit 1
 fi
 
-ssh -o IdentitiesOnly=yes -i "${keyfile}" deploy@209.141.40.107 /usr/bin/riju-install
+ssh -o IdentitiesOnly=yes -o StrictHostKeyChecking=no \
+    -i "${keyfile}" deploy@209.141.40.107 /usr/bin/riju-install

scripts/docker-install-phase3b.bash

@@ -48,9 +48,6 @@ default-jdk
 # Julia
 julia
 
-# Kalyn
-haskell-stack
-
 # Ksh
 ksh
 

scripts/docker-install-phase5.bash

@@ -13,6 +13,12 @@ cd /tmp
 git clone https://github.com/circulosmeos/gdown.pl.git
 mv gdown.pl/gdown.pl /usr/bin/gdown
 
+cd /tmp
+wget https://get.haskellstack.org/stable/linux-x86_64-static.tar.gz
+tar -xf linux-x86_64-static.tar.gz
+mv stack-*-linux-x86_64-static/stack /usr/bin/stack
+rm -rf stack-*-linux-x86_64-static linux-x86_64-static.tar.gz
+
 # D
 cd /tmp
 wget -nv http://downloads.dlang.org/releases/2.x/2.092.0/dmd_2.092.0-0_amd64.deb