Use s3cmd instead of s3-cli since we can pass keys as arg

package.json

@@ -81,7 +81,6 @@
     "mocha": "*",
     "nock": "~0.43.1",
     "redis": "~0.12.1",
-    "s3-cli": "~0.11.1",
     "sinon": "~1.10.3"
   },
   "scripts": {

scripts/createSourceTarball

@@ -2,7 +2,12 @@
 
 set -eu
 
-[[ ! -f "${HOME}/.s3cfg" ]] && echo "~/.s3cfg missing" && exit 1
+: ${AWS_BOX_RELEASE_ACCESS_KEY:=}
+: ${AWS_BOX_RELEASE_SECRET_KEY:=}
+if [[ -z "${AWS_BOX_RELEASE_ACCESS_KEY}" || -z "${AWS_BOX_RELEASE_SECRET_KEY}" ]]; then
+    echo "AWS_BOX_RELEASE_ACCESS_KEY and AWS_BOX_RELEASE_SECRET_KEY env is not set"
+    exit 1
+fi
 
 # Only GNU getopt supports long options. OS X comes bundled with the BSD getopt
 # brew install gnu-getopt to get the GNU getopt on OS X
@@ -39,7 +44,7 @@ cd "${bundle_dir}" && npm install --production
 cd "${bundle_dir}" && tar czvf "${bundle_file}" .
 
 echo "Uploading bundle to S3"
-${SOURCE_DIR}/node_modules/.bin/s3-cli put --acl-public "${bundle_file}" "s3://cloudron-releases/box-${version}.tar.gz"
+s3cmd --acl-public --access_key="${AWS_BOX_RELEASE_ACCESS_KEY}" --secret_key="${AWS_BOX_RELEASE_SECRET_KEY}" --no-mime-magic put "${bundle_file}" "s3://cloudron-releases/box-${version}.tar.gz"
 
 echo "Cleaning up ${bundle_dir}"
 rm -rf "${bundle_dir}" "${bundle_file}"