Merge branch 'koding' into 'master'

Add .koding.yml for testing GitLab on Koding

ref: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/4769

See merge request !170

.koding.yml

+koding:
+  buildDuration: 720 # ~12 min.
+
+provider:
+  aws:
+    access_key: '${var.aws_access_key}'
+    secret_key: '${var.aws_secret_key}'
+
+resource:
+  aws_instance:
+    gdk-instance:
+      root_block_device:
+        volume_size: 30
+      instance_type: c3.xlarge
+      ami: ''
+      tags:
+        Name: '${var.koding_user_username}gitlab'
+      user_data: |
+
+        # define variables:
+        export KODING_USER=${var.koding_user_username}
+        export KODING_USER_EMAIL=${var.koding_user_email}
+        export USER_HOME=/home/$KODING_USER
+        export GITLAB_BOOTSTRAP=$USER_HOME/gitlab-bootstrap.sh
+
+        echo _KD_NOTIFY_@Updating package repository...@
+        # add lxc repo
+        apt-add-repository -y ppa:ubuntu-lxc/lxd-stable
+        apt-get update -y
+
+        echo _KD_NOTIFY_@Installing base requirements...@
+        # install base requirements
+        apt-get install -y software-properties-common python-software-properties git postgresql postgresql-contrib libpq-dev phantomjs redis-server libicu-dev cmake g++ nodejs libkrb5-dev golang ed pkg-config
+
+        # set overcommit_memory
+        echo "vm.overcommit_memory = 1" | tee -a /etc/sysctl.conf
+        sysctl vm.overcommit_memory=1
+
+        cat > $GITLAB_BOOTSTRAP <<EOF
+        #!/bin/bash
+
+        echo _KD_NOTIFY_@Installing RVM and Ruby...@
+        # install rvm
+        gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3
+        curl -sSL https://get.rvm.io | bash -s stable --ruby=2.1.8
+        source $USER_HOME/.rvm/scripts/rvm
+
+        echo _KD_NOTIFY_@Installing bundler...@
+        # install bundler
+        gem install bundler
+
+        echo _KD_NOTIFY_@Cloning GitLab repository...@
+        # clone and run gitlab
+        git clone https://gitlab.com/gitlab-org/gitlab-development-kit.git
+
+        # force to use 0.0.0.0 for localhost
+        echo "0.0.0.0" > gitlab-development-kit/host
+
+        echo _KD_NOTIFY_@Compiling GitLab...@
+        cd gitlab-development-kit
+        make
+
+        EOF
+
+        chown $KODING_USER: $GITLAB_BOOTSTRAP
+        chmod +x $GITLAB_BOOTSTRAP
+
+        su - $KODING_USER -c $GITLAB_BOOTSTRAP
+
+        echo ""
+        echo "Now launch a new terminal and do;"
+        echo "  $ cd gitlab-development-kit"
+        echo "  $ ./run"
+        echo ""
+
+        echo _KD_DONE_
+