Add support for running a view-only MeshMap on Heroku.

[ampledata]

No description provided.

[EvanKrall]

does anywhere else in the codebase use $GLOBALS['USER_SETTINGS']['sql_server'], sql_user, sql_passwd, sql_db, etc? If so you may also want to assign to those on lines 335-339.

[ampledata]

@EvanKrall per grep -iR sql_server *, only the admin interface:

scripts/user-settings.ini-default:;You **must** at least update sql_user, sql_passwd, and sql_server to reflect *your* environment!
scripts/user-settings.ini-default:sql_server = "localhost"
scripts/wxc_functions.inc:      $GLOBALS['sql_connection'] = mysqli_connect($GLOBALS['USER_SETTINGS']['sql_server'],$GLOBALS['USER_SETTINGS']['sql_user'],$GLOBALS['USER_SETTINGS']['sql_passwd'],$GLOBALS['USER_SETTINGS']['sql_db']) or die('Could not connect to mySQL database: ' . mysqli_error($GLOBALS['connection']) . "\n");
scripts/wxc_functions.inc://    $connection = mysqli_connect($sql_server,$sql_user,$sql_passwd,$sql_db) or die('Could not connect to mySQL database: ' . mysqli_error() . "\n");
webpage/admin/status_updates.php:echo " ( " . $USER_SETTINGS['sql_server'] . " ): \n";
webpage/admin/admin.php:        echo " ( " . $USER_SETTINGS['sql_server'] . " ): \n";