Crittercism Auto-Upload dSYM with API Key as an environmental variable

xcode_build_phase.sh

# only upload during Release builds, otherwise every build will upload a dSYM
if [ "${CONFIGURATION}" = "Release" ]; then
    readonly API_KEY_PATH=~/.crittercism_api_key
    # put the secret key in this file
    if [ -f $API_KEY_PATH ]; then
        APP_ID="REPLACE_WITH_MY_APP_ID"
        API_KEY=$(<$API_KEY_PATH)
	# run the script
        source "${SRCROOT}"/<CRITTERCISM_DIR_NAME>/dsym_upload.sh
    else
        echo "$API_KEY_PATH does not exist. Not uploading dSYM!"
    fi
else
    echo "Not a Release build so not auto-uploading dSYM file."
fi