Fixed #61 and #43: fixed epel download, and added dev tools install

opt/vagrant/restore-yum-cache.sh

@@ -1,9 +1,30 @@
 #! /bin/sh
 echo "running $0 $@"
 
+os=`cat /etc/redhat-release`
+
+# no need for caching installs on demo servers
 if [ -d /vagrant ]; then
-  # no need for caching installs on demo servers
-  cp -R /space/software/yum /var/cache/
+  if [[ $os == *"7."* ]]; then
+    cp -R /space/software/yum-centos7 /var/cache/yum
+  else
+    cp -R /space/software/yum /var/cache/
+  fi
 
   sed -i '/keepcache/ s/0/1/' /etc/yum.conf
-fi
+fi
+
+if [[ $os == *"7."* ]]; then
+  rpm --import https://fedoraproject.org/static/352C64E5.txt
+  rpm -Uvh http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-5.noarch.rpm
+else
+  rpm --import https://fedoraproject.org/static/0608B895.txt
+  rpm -Uvh http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
+fi
+
+yum -y update
+if [[ $os == *"7."* ]]; then
+  yum groups mark install "Development Tools"
+  yum groups mark convert "Development Tools"
+fi
+yum -y groupinstall "Development Tools"